Can you help me ID this please?

It's a Sedge Warbler :)

Can anybody help me ID this bird seen at Fen Drayton Lakes today? I got loads of shots of it but it wouldn't fully expose itself. Thanks in advance!

Thanks for that Alan, I didn't know there wasn't an ID thread. I've posted it there, will update this thread once ID'd. The more I look at it, the more I think Chiffchaff.

Dave, I think Chiffchaff for yours too.