PGA I relocated back to the UK some 4 years ago after being overseas in different locations for some 25 years. I can tell you truthfully that the UK is THE most expensive country I have lived in and that includes Singapore. Everybody seems to be running around after me with their hands out for Dosh.
Sid is trying to get out and I dream of the Sun...I have always been based in hot climates...however, In the summer it is the most gorgeous country and I fool myself every year that it is beautiful and full of ancient charm etc etc etc.
Lot of people use Pay as you go Mobiles so you can control your spending...Tariffs generally a bit different and it's a case of doing your homework. As Reddo suggests, use the Internet for providers, house prices etc etc etc.
If you live down South the weather (A relative term) is "better
houses more expensive as is everything else.
If you live oop north, the houses are cheaper and the quality of live (IMHO) is better. Pays your money and you takes your choice, but it is a question of where your employer is.
Hope this helps, and the best of luck, better go to Nice or Provence (Again IMHO)