Interconnector (UK) Limited. Charging Statement related to the IUK Access Agreement and IUK Access Code Issue 10 Applicable from 01 June 2018

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Interconnector (UK) Limited Charging Statement related to the IUK Access Agreement and IUK Access Code Issue 10 Applicable from 01 June 2018 Issue 10 01 June 2018

1. Introduction... 1 2. Reserve Prices for Capacity offered for use during the Gas Year 2017-18... 2 2.1 Daily Firm Capacity... 2 2.2 Monthly Firm Capacity... 2 3. Reserve Prices for Capacity offered for use during the Gas Year 2018-19 and future Gas Years.. 2 3.1 Standard Firm Capacity Products offered via PRISMA... 2 3.1.1 Annual Firm Capacity... 2 3.1.2 Quarterly Firm Capacity... 3 3.1.3 Monthly, Daily and Within Day Firm Multiplier Caps... 3 3.2 Standard Interruptible Capacity Products... 4 3.3 Capacity Products offered via Implicit Allocation... 4 3.3.1 Annual Firm Capacity... 4 3.3.2 Seasonal Firm Capacity... 4 3.3.3 Quarterly Firm Capacity... 5 3.3.4 Monthly Firm Capacity... 5 4. Initial Registration Fee... 5 5. Monthly Administration Fee... 5 6. Maximum Buy-back Price... 6 7. Forced Buy-back Price... 6 8. Net OS Revenue Account... 6 9. Balancing Charges... 6 10. Commodity Charges... 7 10.1 Charges for Gas Year 2017-18... 7 10.1.1 Fuel Gas Charges... 7 10.1.2 Electricity Charges... 7 10.2 Commodity Charges for the Gas Year 2018-19... 7 Appendix 1 Calculation Methodology and Indexation for unit capacity price to apply up to the end of Gas Year 2017-18... 8 Appendix 2 Calculation of Fees... 9 Issue 10 01 June 2018 IUK Charging Statement

1. Introduction This statement sets out the charges that Interconnector (UK) Limited ( IUK ) will apply from the publication date for transportation services provided under an IUK Access Agreement (the IAA ) and the IUK Access Code ( IAC ). The statement will be revised and reissued when appropriate. These charges are consistent with the principles outlined in IUK s Charging Methodology. Entry and Exit Capacity is made available for sale by means of auctions on the PRISMA platform in accordance with Commission Regulation (EU) 2017/459 ( CAM Code ). In addition, capacity may be made available via an Implicit Allocation Mechanism using an Implicit Allocation Partner according to the rules set out in Annex B-3 of the IAC. For capacity offered for use during the period to 1 October 2018, the reserve prices have been determined as set out in Appendix 1. For capacity offered for use from 1 October 2018 onwards the factors determining the prices are: Competitive forces and the prices of competing and complementary services; Operating costs for operating and maintaining the company and its assets; Capital expenditures required to maintain the service; Projected customer demand for IUK capacity and the forecast volume of both long term and short term sales under a range of market scenarios; and A risk premium applied to the yearly standard capacity product reflecting the benefits of certainty regarding the level of the price. The level of the premium has been set to zero. IUK s reserve prices for allocation through an auction or prices for allocation through implicit allocation are fixed at the time of allocation. For products to be used in a future year, this fixed price will be subject to annual indexation 1. Any auction premium will be used by IUK to contribute to maintaining and operating the pipeline. IUK offers capacity in kwh/h and all capacity related charges are calculated as p/(kwh/h)/h and then aggregated to a per runtime basis for capacity products offered on PRISMA. Capacity offered via an Implicit Allocation Mechanism ( IAM ) will be in p/(kwh/h)/h. Capacity charges will be calculated using the relevant p/(kwh/h)/h and the hours in the billing period. Invoiced amounts will be either in Pounds sterling to the nearest penny or Euros to the nearest euro cent. Further information on the charges that apply for transportation services under an IAA is set out in Section F of the IAC and IUK s Charging Methodology. The definitions of terms used in this document can be found in the IAA. Information about IUK and copies of the IAA, IAC and IUK s Charging Methodology can be found on the IUK website at www.interconnector.com. 1 See IAC Section F paragraph 5.3. Indexation is based on RPI - CHAW Index numbers of consumer prices RPI All Items. Issue 10 01 June 2018 1 IUK Charging Statement

2. Reserve Prices for Capacity offered for use during the Gas Year 2017-18 2.1 Daily Firm Capacity The unit price to apply is 0.017442 p/(kwh/h)/h. Daily Capacity will therefore be offered to the market in the daily auctions on the PRISMA platform at the following reserve prices: p/(kwh/h)/day Bacton Entry 0.418608 Exit 0.418608 Zeebrugge Entry 0.418608 Exit 0.418608 2.2 Monthly Firm Capacity The unit price to apply is 0.017442 p/(kwh/h)/h. Monthly Capacity will therefore be offered to the market in the monthly auctions on the PRISMA platform at the following reserve prices: p/(kwh/h)/month Jul 18 Aug 18 Sep 18 Bacton Entry 12.976848 12.976848 12.558240 Exit 12.976848 12.976848 12.558240 Zeebrugge Entry 12.976848 12.976848 12.558240 Exit 12.976848 12.976848 12.558240 The large price step in an auction is set at 5% of the above IUK reserve prices published on the PRISMA platform. 3. Reserve Prices for Capacity offered for use during the Gas Year 2018-19 and future Gas Years 3.1 Standard Firm Capacity Products offered via PRISMA Annual Firm Capacity The unit prices to apply are as follows: 2018-19 2019-20 to 2022-23 2023-24 to 2032-33 p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h Bacton Entry 0.018767 0.017061 0.015355 Zeebrugge Exit 0.018767 0.017061 0.015355 Zeebrugge Entry 0.018767 0.017061 0.015355 Bacton Exit 0.018767 0.017061 0.015355 Issue 10 01 June 2018 2 IUK Charging Statement

Annual Capacity will therefore be offered to the market in the yearly auction on the PRISMA platform at the following reserve prices: 2018-19 2019-20 (Leap year) 2020-21 2021-22 2022-23 2023-24 to 2032-2033 Leap year 2 p/(kwh/h)/yr p/(kwh/h)/yr p/(kwh/h)/yr p/(kwh/h)/yr p/(kwh/h)/yr Bacton Entry 164.398920 149.863824 149.454360 134.509800 134.878320 Zeebrugge Exit 164.398920 149.863824 149.454360 134.509800 134.878320 Zeebrugge Entry 164.398920 149.863824 149.454360 134.509800 134.878320 Bacton Exit 164.398920 149.863824 149.454360 134.509800 134.878320 Quarterly Firm Capacity The unit prices to apply are as follows: Oct 18 - Dec 18 Q4 2018 Jan 19 - Mar 19 Q1 2019 Apr 19 Jun 19 Q2 2019 Jul 19 Sep 19 Q3 2019 p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h Bacton Entry 0.018767 0.018767 0.025591 0.025591 Zeebrugge Exit 0.018767 0.018767 0.025591 0.025591 Zeebrugge Entry 0.025591 0.025591 0.018767 0.018767 Bacton Exit 0.025591 0.025591 0.018767 0.018767 Quarterly Capacity will therefore be offered to the market in the quarterly auctions on the PRISMA platform at the following reserve prices: Oct 18 - Dec 18 Q4 2018 Jan 19 - Mar 19 Q1 2019 Apr 19 Jun 19 Q2 2019 Jul 19 Sep 19 Q3 2019 p/(kwh/h)/qtr p/(kwh/h)/qtr p/(kwh/h)/qtr p/(kwh/h)/qtr Bacton Entry 41.456303 40.517953 55.890744 56.504928 Zeebrugge Exit 41.456303 40.517953 55.890744 56.504928 Zeebrugge Entry 56.530519 55.250969 40.987128 41.437536 Bacton Exit 56.530519 55.250969 40.987128 41.437536 The large price step in an auction is set at 5% of the above IUK reserve price published on the PRISMA platform. Monthly, Daily and Within Day Firm Multiplier Caps The absolute level of the price multipliers caps relative to the prices for firm Annual Capacity: Monthly 3 Daily 6 Within Day 6 The actual prices for these products will be published at the latest as follows: Publication Monthly Daily Within Day Prices published in advance of the relevant CAM auction 2 weeks 6 hours 1 hour 2 Gas Years 2023-24, 2027-28 and 2031-32 Issue 10 01 June 2018 3 IUK Charging Statement

3.2 Standard Interruptible Capacity Products IUK will offer daily interruptible capacity if the corresponding daily standard firm capacity product was sold at an auction premium, was sold out, or was not offered. The daily interruptible capacity reserve prices will be at a 10% discount to the prevailing daily standard firm product reserve prices. IUK may offer annual, quarterly, monthly and within day interruptible capacity if the corresponding standard firm capacity product was sold at an auction premium, was sold out, or was not offered. If offered, the interruptible capacity reserve prices will be at a 10% discount to the corresponding standard firm product of the same period. The interruptible capacity discount has been set at 10% to the corresponding standard firm capacity product to signal that this capacity may be interrupted 3. 3.3 Capacity Products offered via Implicit Allocation Annual Firm Capacity Annual Firm Capacity may be offered for any of the following five Gas Years. The fixed prices to apply are as follows: 2018-19 p/(kwh/h)/h 2019-20 to 2022-23 p/(kwh/h)/h Bacton Entry 0.018767 0.017061 Zeebrugge Exit 0.018767 0.017061 Zeebrugge Entry 0.018767 0.017061 Bacton Exit 0.018767 0.017061 Seasonal Firm Capacity Capacity may offered for any two consecutive Quarters in the next three years. The fixed prices to apply are as follows: Oct 18 - Mar 19 Winter Jan 19 - June 19 H1 2019 Apr 19 Sep 19 Summer Jul 19 Dec 19 H2 2019 p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h Bacton Entry 0.018767 0.021326 0.023885 0.021326 Zeebrugge Exit 0.018767 0.021326 0.023885 0.021326 Zeebrugge Entry 0.023885 0.021326 0.018767 0.021326 Bacton Exit 0.023885 0.021326 0.018767 0.021326 Oct 19 - Mar 20 Winter Jan 20 - June 20 H1 2020 Apr 20 Sep 20 Summer Jul 20 Dec 20 H2 2020 p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h Bacton Entry 0.018767 0.021326 0.023885 0.021326 Zeebrugge Exit 0.018767 0.021326 0.023885 0.021326 Zeebrugge Entry 0.023885 0.021326 0.018767 0.021326 Bacton Exit 0.023885 0.021326 0.018767 0.021326 3 In last 10 years there have been very few interruptions to firm capacity rights. Whilst this suggests a very low discount relative to standard firm products, in a situation when the corresponding standard firm capacity has all be sold out, given IUK is a single asset without access to a wider system, IUK s capacity is limited by its interconnection point technical capacity. There will therefore be a higher risk of interruption than suggested by looking at just historical hours lost. IUK has hence rounded the discount to 10%. Issue 10 01 June 2018 4 IUK Charging Statement

Oct 20 - Mar 21 Winter Jan 21 - June 21 H1 2021 Apr 21 Sep 21 Summer p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h Bacton Entry 0.018767 0.021326 0.023885 Zeebrugge Exit 0.018767 0.021326 0.023885 Zeebrugge Entry 0.023885 0.021326 0.018767 Bacton Exit 0.023885 0.021326 0.018767 Quarterly Firm Capacity Capacity may be offered for any of the following four Quarters. The prices to apply are as follows: Oct 18 - Dec 18 Q4 2018 Jan 19 - Mar 19 Q1 2019 Apr 19 Jun 19 Q2 2019 Jul 19 Sep 19 Q3 2019 p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h Bacton Entry 0.018767 0.018767 0.025591 0.025591 Zeebrugge Exit 0.018767 0.018767 0.025591 0.025591 Zeebrugge Entry 0.025591 0.025591 0.018767 0.018767 Bacton Exit 0.025591 0.025591 0.018767 0.018767 Whilst IUK has the right to change the quarterly firm capacity prices at least a week in advance of the relevant Implicit Allocation offering, prices will be fixed at the time of allocation. Monthly Firm Capacity Capacity may be offered for any of the following three months. The prices to apply are as follows: Oct 18 Nov 18 Dec 18 p/(kwh/h)/h p/(kwh/h)/h p/(kwh/h)/h Bacton Entry 0.034121 0.018767 0.018767 Exit 0.034121 0.018767 0.018767 Zeebrugge Entry 0.034121 0.034121 0.034121 Exit 0.034121 0.034121 0.034121 Whilst IUK has the right to change the monthly firm capacity prices at least a day in advance of the relevant Implicit Allocation offering, prices will be fixed at the time of allocation. 4. Initial Registration Fee The Initial Registration Fee charged by IUK for any new IAA Shippers signing an IAA during the Gas Year 2017-18 is set to zero. 5. Monthly Administration Fee The Monthly Administration Fee payable by each IAA Shipper under an IAA during the Gas Year 2017-18 is 501. The fee for future Gas Years will be calculated as set out in Appendix 2. Issue 10 01 June 2018 5 IUK Charging Statement

6. Maximum Buy-back Price When IUK implements the Buy-back procedure as set out in the IAC Section C paragraph 3.1, it will accept offers from shippers subject to paying no more than the Maximum Buy-back Price. This is the aggregate price that IUK will pay for offered Entry Capacity and Exit Capacity and will be calculated as the weighted average price paid for that day s Entry Capacity and Exit Capacity plus a premium of 0.034210 p/(kwh/h)/h for Gas year 2017-18. The premium for future Gas Years will be calculated as set out in Appendix 2. 7. Forced Buy-back Price When IUK implements the Forced Buy-back procedure set out in the IAC Section C paragraph 3.2, it will pay an IAA Shipper for the reduction in Entry Capacity and Exit Capacity at the Forced Buy-back Price. This price shall be the price paid by the IAA Shipper for such capacity plus a premium equal to 5% of the weighted average price paid for all Entry Capacity and Exit Capacity for that day. 8. Net OS Revenue Account IUK will keep track of the revenue from IAA Capacity sales that originated from oversubscription on a cumulative basis over the Gas Year, minus any payments made for Buy-back during that time. The net amount will be allowed to go negative up to a limit, the Maximum Deficit, of 100,000. At this level, if further Buy-back is required, IUK will implement the Forced Buy-back procedure. At the end of the Gas Year, if the balance in the Net OS Revenue Account is positive, then 75% of this amount (the Net Revenue Share ) will be distributed to all shippers (STA and IAA Shippers, and Sub- Lessees under the STA) based on their allocated flow over the year. If the balance in the Net OS Revenue Account is negative, the amount to be distributed shall be zero. 9. Balancing Charges An IAA Shipper has an obligation to be in balance on an hourly basis such that its Intended Inputs equal its Intended Outputs. Intended Inputs and Intended Outputs take into account the IAA Shipper s Confirmed Nomination Quantities for Entry and Exit and additionally any Acquiring or Disposing Trade Notifications. Any differences that occur between allocated Inputs and Outputs (such differences only arise during exceptional circumstances), are allowed to accumulate from one day to the next without any penalty or recompense within an allowed cumulative tolerance ( Allowed Tolerance ) for each IAA Shipper of ±560,000 kwh. On any Gas Day on which the IAA Shipper s accumulated imbalance exceeds the Allowed Tolerance, a Balancing Charge shall apply as detailed in the IAC Section E and Section F. Issue 10 01 June 2018 6 IUK Charging Statement

10. Commodity Charges 10.1 Charges for Gas Year 2017-18 Fuel Gas Charges During the Gas Year 2017-18, a Fuel Gas Charge shall be payable by an IAA Shipper in respect of any Gas Day on which any Fuel Gas is allocated to the IAA Shipper in accordance with the IAC Section D. Such charge shall be an amount (in Pounds Sterling) equal to the Negative Imbalance Daily Gas Price multiplied by the total quantity of Fuel Gas allocated to that IAA Shipper on that Gas Day (ref. IAC Section F). Electricity Charges During the Gas Year 2017-18, each IAA Shipper shall pay a monthly electricity charge, an amount (in Euros) equal to the Estimated Compressor Electricity Unit Cost multiplied by the total amount of electricity allocated to that IAA Shipper in that month in accordance with IAC Section D. For the Gas Year 2017-18, the Estimated Compressor Electricity Unit Cost has been determined as 0.1 Euro/kWh. After the Gas Year a reconciliation will take place based on the actual costs of Compressor Electricity as detailed in IAC Section F. 10.2 Commodity Charges for the Gas Year 2018-19 In accordance with Section F paragraph 9.3 of the IAC, IUK will invoice each IAA Shipper with a Monthly Commodity Charge which covers the cost of flowing gas taking into account shrinkage. The indicative commodity charges for the Gas Year 2018-19 are: Commodity Charge (Bacton) Commodity Charge (Zeebrugge) 0.005118 p/kwh 0.027297 p/kwh IUK will publish the actual charges in September, a month in advance of the next Gas Year. Issue 10 01 June 2018 7 IUK Charging Statement

Appendix 1 Calculation Methodology and Indexation for unit capacity price to apply up to the end of Gas Year 2017-18 IUK s Charging Methodology for all charges under the IAA and IAC, including the method for calculating the Reserve Price, has been approved by Ofgem and CREG following a public consultation as meeting IUK s standard licence condition of being objective, transparent and non-discriminatory to both existing and prospective IUK Shippers. The base value is calculated from the average cost of capacity derived from IUK s Financial Statement for year ending 30 th September 2013: Tariff based on construction costs = 142,883,000 Tariff to recover operating costs = 34,901,000 Total Capacity (kwh/h) = 59,731,735 (equivalent to 45.5 bcm/yr) AVERAGE COST OF CAPACITY FOR GAS YEAR 2012-13 = ( 142,883,000 + 34,901,000)*100/(8760*59,731,735) = 0.033977 p/(kwh/h)/hour An indexation factor is used to calculate the total Reserve Price for IAA capacity for future Gas Years: Indexation Factor = ratio based upon the Producer Price Index (PPI) = PPIr/PPIo (see Appendix 2 for PPI Data), where PPIr = the average value of the PPI for the twelve month period ending on 30 June immediately prior to the commencement of the Gas Year which ends on 30 September in year r in respect of which the price is calculated (see Appendix 2) PPIo = average PPI for twelve months ending 30 June 2012 = 106.1083 Calculation of base Reserve Price effective from 1 October 2017 From table in Appendix 2 : PPIr for 2017-18 = 108.9417 Indexation Factor for 2017-18 = 108.9417/106.1083 = 1.0267 TOTAL BASE RESERVE PRICE FOR CAPACITY FOR GAS YEAR 2017-18 = 0.033977 * 1.0267= 0.034884 p/(kwh/h)/hour This is split 50:50 into the base Entry Capacity Reserve Price and base Exit Capacity Reserve Price of 0.017442 p/(kwh/h)/hour. Issue 10 01 June 2018 8 IUK Charging Statement

Appendix 2 Calculation of Fees The following fees will, in future Gas Years, be calculated according to the value of the following (a) Monthly Administration Fee: 500*Fee Indexation Factor (b) Maximum Buy-back Price premium: 0.034121*Fee Indexation Factor (expressed in p/(kwh/h)/h) Fee Indexation Factor = PPIr / PPIo, where: Producer Price Index or PPI means the JVZ7 Index numbers of producer prices PPI : 7200700000 : Net Sector Output Prices Output of manufactured products as published by the Office for National Statistics in the monthly Producer Price Index Dataset (or any successor to such Index published by such Office or any other department of HM Government) at www.ons.gov.uk. PPIr = the average value of the PPI for the twelve month period ending on 30 June immediately prior to the commencement of the Gas Year which ends on 30 September in year r in respect of which the price is calculated PPIo = average PPI for twelve months ending 30 June 2014 = 108.6583 The relevant PPI data from the above referenced source and used in this document, is reproduced below Base 2010=100 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Avg PPIr 2011-12 105.4 105.4 105.6 105.6 105.8 105.7 105.9 106.3 106.8 107.2 107 106.6 106.1083 PPI 13 2012-13 106.8 107.2 107.5 107.6 107.4 107.2 107.6 108.1 108.4 108.3 108.3 108.4 107.7333 PPI 14 2013-14 108.7 108.8 108.8 108.5 108.3 108.3 108.6 108.7 108.8 108.9 108.8 108.7 108.6583 PPI 15 2014-15 108.6 108.5 108.3 107.7 107.6 107.1 106.6 106.8 106.9 107.0 107.1 107.1 107.4417 PPI 16 2015-16 106.9 106.4 106.3 106.1 105.9 105.6 105.5 105.6 106.1 106.5 106.6 106.9 106.2000 PPI 17 2016-17 107.1 107.3 107.6 108.3 108.4 108.7 109.3 109.5 110 110.3 110.4 110.4 108.9417 PPI 18 Issue 10 01 June 2018 9 IUK Charging Statement