I timed myself as 46:19 and the "Provisional Results" list me as 46:09 - that's about the same difference as you Jel. And no, I'm not complaining either - brill run.
It's alright, UmBongo isn't listening. Well, it sounds like a good course for a PB attempt. I'm going to bet you get much closer to 46. Possibly under 46!