Tin hat on here. I never had any real issues with Webb's reffing in derby matches. It seems to get forgotten that he did the 50th anniversary match at Old Trafford and he didn't do anything wrong IMO. In fact, he let a bit go from Hamann early on in that game, and United were pulled up for 2 foul throws IIRC. Same with the 1-0 at our gaff at the back end of the 2011/12 title-winning season. Nothing controversial from him in that game for me. I was always far more wary of Clattenburg reffing derby matches than I was of Webb.