Can you help me identify this bird - sorry no photo

Hi,

This is my first time on the RSPB forum.

I hope someone can enlighten me.

I am staying on a caravan site on the shore of Loch Ness. (No. this is not a shaggy dog story).

I was sitting by the side of the lake (sorry. Loch) drinking coffee (Not beer)

when a bird landed in a bush not more than 15ft away from me.

at first i thought it was a blue tit but realised that it was greenish yellow not blue.

It had a black head so was it a coal tit? I looked it up in my book and saw under coal tit that there is an Algerian / Tunisian Variety. Could this be the bird I saw? it was definitely not a great tit or an English (or Scottish coal tit.

Has anyone any suggestions what it may have been.

Guillemot Guy.