The answer is no.
I think there would be plenty of room left
http://www.google.com/imgres?imgurl=http...
Since the prevailing winds are from England to France, I don't think that would be your best option. Having lived with the French for a short time, you might have a hard time finding any showers to wash the radiation off you.
It depends on how big it is or how many exploded.
If I were you I would visit my cousins in Denmark or as far away as you can
I was wondering because England's pretty small compared to most countries, If a nuclear plant exploded would we get evacuated to somewhere in the rest of Europe?
