Hi there,
In conditional formation select Formula is...
=AND(OR($B$1="GB05",$B$1="GB08"),$E$12="")
Format Pattern Red.
This should do the trick!
Hi,
I've copied and pasted the formula back into a work book, and it works perfectly.
Are you inserting it directly into cell B11 and creating a circular ref? or are you going to conditional format for cell B11 and pasting it under "Formula Is"?
Regards
Roger