Willow or Marsh Tit? Lincs, UK (1 Viewer)

I took this photo in Lincs in Jan 2009 and have catalogued it as Willow Tit, but it's always good to review things and now I'm wondering. The bib seems to be small but the cheeks appear to be white all the way to the crown, the slight darkening is caused by a shadow. So, I'm a little unsure although I think I still favour Willow. Grateful for any thoughts, with reasons, please.

I think this is a Willow Tit - dull, slightly brown crown, extensive white cheek, diffuse lower edge to black chin; no clear white spot at base on upper mandible, buff slash across lower edge of white cheek.

cheers, alan

Thanks, Alan.