Here's the phone I've got. Most suppliers were originally offering it around £130, with a few charging between £100 and £120. However Argos are now clearing it for £70:
http://www.argos.co.uk/product/7362332
(I know people who've got £400+ phones and I can't see that they've got anything that mine hasn't)
It's got a a very good camera, an excellent screen, long battery life and is a doddle to use.
Once you've got a phone you'll need either a contract or a pay-as-you-go deal to go with it. I use Asda Mobile, as they're one of the cheapest and their customer service is excellent. (If you've got any queries simply give them a call. They answer their phones almost instantly, putting you through to really knowledgeable people here in the UK). You can see their prices here:
https://mobile.asda.com/bundles