§ Laura Moffatt
To ask the Deputy Prime Minister whether a decision has been taken to authorise the replacement of the existing ozone-depleting CFC-based air conditioning chillers at the Queen Elizabeth II Conference Centre with a new refrigerant system. 
§ Mr. Leslie
The existing QEII Conference Centre air conditioning system uses CFC as a refrigerant. Legislation resulting from the Montreal Protocol proscribes the supply and topping-up of CFCs for the maintenance of refrigeration and air-conditioning systems. Taken together with the age of the existing plant, a replacement system is required.
Following extensive consultations and evaluation, I have decided to authorise the replacement of the old ozone-depleting CFC air conditioning chillers at the Queen Elizabeth II Conference Centre.
The optimum replacement solution has been identified as ammonia-based chiller technology, which has no ozone or global warming depletion potential. Ammonia-based chiller technology is widely accepted as the most efficient and environmentally friendly refrigerant, has better whole life costs and represents value for money.
This decision has been taken fully in accordance with Government policy and the UK climate change programme.