A yellow wagtail.. I think :-/

Blipfoto is a wonderful place.
Was just thinking of all the different plants and birds I can now recognise since this time last year.
Been trying to catch this fellow all week, but he don't stay in one place for too long to capture with my camera.
The yellow plumage looks beautiful when it's sunny and the way he wags his tail feathers up and down is unusual.
Hence I think he (that's another assumption) is a yellow wagtail.
Sorry I haven't been able to comment very much this week, not so easy at times, relying on iPhone and a less than brilliant 3G signal.
It's Friday, time to chill :-)
Hope you all have a brilliant weekend