Nuclear Energy (Financing) Bill

When the noble Lord says that there should be no cost to the public purse, is that in regard only to future projects or also to existing nuclear power stations? I mentioned in my intervention the situation in Trawsfynydd, the cost of decommissioning which could never have been anticipated when it was built. Is there not a case in those circumstances that the public purse is the only way to bail out that sort of situation?