Never noticed Wickes don't sell black, I'm sure I've seen it in the past but now its just white, beech and oak and B&Q the same.
If you don't want large width B&Q sell "shelf boards" in black.
Deralam in Birkenhead do Kronospan in black.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates