Here are the climate-related sections of speeches by MPs during the Commons debate Electricity Generation.
Full text: https://hansard.parliament.uk/Commons/2010-02-05/debates/10020537000172/ElectricityGeneration
Dr. Pugh
To ask the Secretary of State for Energy and Climate Change what estimate he has made of the price per megawatt hour of electricity generated over the life cycle of proposed new (a) coal, (b) gas, (c) oil, (d) hydroelectric, (e) nuclear and (f) tidal power generating facilities. ( 314344 )
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Mr. Kidney
More recently the Committee on Climate Change (CCC) have published estimated levelised costs (£/MWh, in 2008 prices) associated with 1 MWh of electricity generated from some technologies, for their December 2008 report
http://www.theccc.org.uk/pdf/TSO-ClimateChange.pdf
The estimated costs of tidal generation were estimated as part of the response to the consultation on the Renewable Energy Strategy. These are set out as follows:
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