Warbler? Updated!

I think I might've seen some sort of warbler in the garden this morning… I popped outside as I do every morning to slug/snail hunt before setting off to work and it seemed rather busy in the area with birds singing - something that's been lacking for the last few weeks or so.

There was one call I didn't recognise and thought it may be one of the tits - although not the usual tune or perhaps a song thrush as it was very melodious compared to the finch calls.
I came back inside and saw a Coal tit come down, and again a few minutes later with some blue tits (on a side note, in Scotland the Coal tits were always picked on by the blue and great tits, yet here they seem to be happy in a flock.. odd).

Anyway, something then flutters into their hiding Hawthorn - all the birds usually fly into this before coming down onto the feeder. I check things out with the camera and thought I could see a mystery bird, I have photos but they were too small to tell for sure on the screen and most of the time it wasn't facing the camera - grrr.

So I'll have to upload them tonight to check what it could've been. I thought the warblers would have gone by now? Unless it's passing through, it'll be a shame if it doesn't hang around for a couple of days at least.

Right, I've uploaded them now... What do we think?

I'm thinking Garden Warbler just going by the song I could hear as it sounded like a song thrush or a blackbird would sing, but there appear to be two different ones... Is one a juvenile and the other the adult?

Please bare in mind these images are heavily cropped, just to enable you to actually see the bird...

Showing the back

The second bird, check the eyebrow compared to the other... Also very yellow.