Is there a free dating site where u can look at pics and just start chatting?

[Stuart]

I am a man from the UK and I would like to join a dating website where you can see womens pictures and if you like the look of them just IM them and start talking instantly if they are online and women can do that with me if they like my picture/profile. However I would rather do it for free rather than pay. Can anybody suggest a good website