1. 20 September 2015 GAZ DE FRANCE ESS Introduction of Gas Reserve Arrangements Mark Bailey Gaz de France ESS

2. GAZ DE FRANCE ESS 20 September 2015 Winter 2005/06 Actual demand below seasonal normal during peak winter months Demand above seasonal normal Late November 05 Middle March 06 Rough Storage Unavailable from 16 th February 06 Minimal demand response

3. GAZ DE FRANCE ESS 20 September 2015 Demand Side Response - Gaz de France ESS Response entirely price driven Reliant on customers who were exposed to short term prices Limited response from customers who had hedged Concerns regarding next winter Buying behaviour may alter to move away from Day Ahead Customers are much less price responsive to potential opportunities rather than avoiding costs Our Customers response 13th March 170,000 therms (P70) More response on 14 th and in the rest of the week

4. GAZ DE FRANCE ESS 20 September 2015 Customer’s Response Why was response higher after 13 th March Day Ahead Prices for 14 th onwards much higher than for the 13 th 13 th - 59.8p/th vs 14 th - 195 p/th Customers need time to respond Decide on their own trigger level Discover the amount of alternate fuel available Under the present regime there is no incentive to prepare Without appropriate planning switching may take time

5. GAZ DE FRANCE ESS 20 September 2015 Demand Side Response

6. GAZ DE FRANCE ESS 20 September 2015 Why do we need gas demand side response? Prevent progressing into a gas deficit emergency and: Expands the choice of NGG re residual balancing Introduces certainty and visibility around deliverable demand reduction Establishes incentives for customers to actively participate Supplies may not meet demand due to: Very cold weather Supply side failure eg. Storage, Beach, LNG, Interconnector How much demand side response is needed? NG Gas 1 in 10 scenario for winter 06/7 requires 50-60mcm demand side response Relatively low levels of demand response seen so far  75% volume CCGT, 25% volume from customers

7. GAZ DE FRANCE ESS 20 September 2015 Market benefits of demand response certainty Gives better knowledge of firm customers that may be available to respond Facilitates economic and efficient operation of the pipeline system Achieves greater certainty about actual demand reduction deliverable on the day as it gives better knowledge of firm customers that may be available to respond May allow upward adjustment of GBA trigger level Customer response avoids passing through problems to electricity market Diversifies risk away from storage only options – hedges reliability (eg. Rough) Restore confidence in supply/demand balance which may reduce wholesale market volatility and smooth market prices

8. GAZ DE FRANCE ESS 20 September 2015 How did electricity accomplish demand side participation? Demand Side Ancillary Services were created Large electricity supply customers began to provide services in competition with generators Increased competitiveness Increased volume of response made available Standing Reserve Delivered in 20 mins, run for 2 hours Availability and utilisation payments made. Frequency Response Instantaneous trip, load management 30 mins Availability payments only

9. GAZ DE FRANCE ESS 20 September 2015 Demand Side Portfolio Through our involvement within the I&C supply market, we were able to offer large volumes of MWs to NG Our total Ancillary Services business brought to NG to date is; FCDM – 200MW Standing Reserve – 760MW This growth is due to customers being incentivised to make load available via guaranteed payments Energy only payments would not have produced these volumes (see Demand Turndown) NG are keen to develop further in this area and have been reported to be looking for an additional 250MW in 2006/7

10. GAZ DE FRANCE ESS 20 September 2015 Growth of Schemes from Existing and New Participants Customers initially ‘test’ participation, offering limited volumes Increased response from existing providers is evident on both schemes; Stems from participants’ experience and confidence in service provision grows. Growth in some cases as high as 75% Companies in similar industries are also encouraged to participate

11. GAZ DE FRANCE ESS 20 September 2015 How do we see the scheme working? Product structure Quasi-storage - aggregated bundles to mirror storage deliverability (by storage type or facility type) NGG run a tender process – number of times a year to be agreed NGG contract with shipper but dispatch customer directly to avoid time delay Prices structured to best encourage investment in switching fuels by offering an Availability and Utilisation Payment Customers shouldn’t be limited to contracting with their supplier

12. GAZ DE FRANCE ESS 20 September 2015 Cost Recovery Route Cost recovery would be targeting on those who have caused the system action to be taken i.e. those who are out of balance The Availability Payment element will be known immediately NGG decide how many participants there are known The cost of the flat fee will flow through to SMP buy price The Utilisation Fee element will be individually agreed between NGG and each participant agreed bilaterally during the economic assessment period of the tender process The cost of the utilisation fee will feed through to SAP Non delivery will be discouraged via events of default and associated contractual consequences

13. GAZ DE FRANCE ESS 20 September 2015 Summary It is time for action now ahead of winter 2006/07 Improved scheme vital to enable demand side response to prevent emergency measures Incentive on customers to participate Provide a mechanism to reflect the true value of their services Follow the lead given by electricity Increased demand side response would Increase security of supply Dampen price spikes