[Martinbuilt]

England is big. Where are you going exactly?
Coventry has a great transportation museum. It's the Detroit of the UK, so everyone will look at you like you're insane if say you're going there...
We thought it was cool. There's a huge bombed-out cathedral and a statue of Lady Godiva in town.
If there are Harry Potter fans with you, Watford is where the original studios are. Fantastic to see that stuff in person.
Liverpool has been overhauled, very posh, but worth visiting if you have any interest in the Beatles.
London is cool, but chaotic.
I can't remember the name of the town, but northeast of London is home to Shakespeare. There's little village full of half-timbered thatch roof houses.
Depends what you're going for.
Dress warm,weather's going to be miserable in march.