I believe this is the best decision this government has made so far. (Mind you, not much to compete with )
Nuclear power has to be part of any plan for the future of the UK's energy supply. There is just no realistic alternative and I honestly believe that anyone who thinks otherwise just hasn't done the necessary amount of research on the topic.
Yes there are other energy sources and they should be invested in, but there is nothing that will supply us with a solution for the next 2 or 3 generations.
And of course there is the alternative of going back about 200yrs, without electricity, hot running water, etc. With all of its economic and social consequences. Not something I am hoping for, personally.
I am very sad that it has taken 20yrs of dilly-dallying by successive governments to finally recognise the need and take steps to ensure our future energy security. Now, the only way to build a nuclear reactor in the UK is using foreign investment and expertise, which I deeply regret. 20 yrs ago it would have been a different story, but now the expertise has (mostly) been lost.
For those of you worried about accidents at nuclear plants: take a look over the channel. France generates 80% of its electricity using nuclear power. Its major nuclear waste reprocessing facility (which is reprocessing far more than Sellafield ever did) is situated right at the tip of the Cherbourg peninsula, closer to British population centres in Alderney and the Channel Islands than to any French town. An accident there would have huge consequences for the southern UK. The plant was built decades ago, presumably to lower safety standards than we have now, and is processing far more than it was designed for. If you want to worry about something, go and worry about that.