How do i go about buying a digital TV?

I’m a complete amature.
1) What digital tv’s do you recommend under £200?
2) How do i check if the signal will work where i live?
3) What features should i look for in a digital tv?
4) What shops in the UK can i get one from?
5) Please any extra information i need to know on digital tvs?

The best advice I can give you is to take a trusted friend who has knowledge & experience with you to an electronics store that he or she trusts.