Zoe - here's some mind games for you when you get to Winston Churchill Avenue .... Just concentrate on getting to that roundabout, totally ignoring those going the other way.... BUT your reward when you get there is to look at all the runners now behind you going the other way, and congratulate yourself for getting to the roundabout so easily. By the time you get back to the Uni you'll have got over your fear and also be a mile nearer the end !!
For the record, every time I've done this race (4 times), I've always been in the Orange wave and you still get walkers and people way out of their league in that one too. Not that I'm in any way super-fast myself, but it is always this race that seems to wind me up about people putting themselves in the wrong wave. Still, I'm over it (!) and I'm happy to try and just get a decent time rather than chase a PB. My advice - just enjoy the race, it's a great course, good support, and hardly windy at all in the last 2 miles !!!