I had a different problem to you - mine was a ACL rupture, and I had an exploratory laparoscopy - when I woke up the surgeon told me he'd done a micro fracture, gave some crutches and told me not to weight bare for 6 weeks - that was a bit of a shock!
Mine didn't work either ... I had a ACL reconstruction a year later and 14 marathons later I'm doing ok!
Its been fascinating reading the comments - this was my first double weekend. I ran Worcester on the Sunday and had no idea what Milton Keynes would be like - I'd never run more than 8 miles the day after a marathon.
In short, I loved this race - I couldn't stop smiling the whole way around. I thought the support, even during the quieter patches was fabulous - not in terms of numbers, but in sentiment - people seemed so enthusiastic. And I loved the red way (?), and all the little underpasses gave me a chance to run a bit faster downhill, so the changes of pace kept it interesting, for me anyway.
I shall definitely be doing this again, but I'd get to the car park a bit earlier!
I got a club place this year, and at first I thought I didn't want to do it again - the crowds were almost more than I could bear during the last 4 miles, they were all just screaming ...
... but then I thought about the first half of the race, and for me this was better - here were (I think) the locals ... people with music outside their homes, outside their pubs, and my favourite, two women - one banging a pan lid and the other was just dancing!! I'd do it again just to see them!!