I did this race last year, two weeks after achieving a PB in London of 3:07. I managed 3:09 in Sunderland. It was a very friendly affair but I did not find it that flat, in fact the penultimate mile was a cruel climb.
I would have done this race again without hesitation had it not now being scheduled for the week after London.
I even saw Steve Cram on route last year and managed to have a brief chat with him whilst he passed me in the race car!