§ Mr. Grogan
To ask the Secretary of State for Trade and Industry what the capability is for holding stocks of back-up fuels at each of the combined cycle gas turbine power stations commissioned since 1990 in days of use at full levels of generation. 
§ Mr. Wilson
We do not keep such statistics. It is for the owners of those power stations to ensure adequate stocks of back-up fuels to meet their contractual and contingency liabilities.