I have at least 9 full tiles in bright yellow, somewhere between buttercup and egg yolk in hue, and much brighter than the picture. 20cm square. Used, so you'll need to knock the mortar off them. I've also a half feed bag of broken bits - good for mosaics?
I am in Halton.
9 x bright yellow 20cm tiles (Halton LA2)
This offer has been gifted to someone and is no longer available.