It's a Sedge Warbler :)
My blog: http://mazzaswildside.blogspot.co.uk/
My Flickr page: https://www.flickr.com/photos/124028194@N04/
Thanks Aiki. wasn't 100% sure.
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.