I'd say the course was like a rollercoaster, Flynn could give a better mile by mile breakdown on Halstead, where are you Flynn?!
I much prefer this type of undulating run than the flatness of London.
There are two (hills) I remember, one at about 3 miles and one about 16 (someone correct me if I've got that wrong) but they are over and done before you have time to think about them.
It's such a lovely course, running on country lanes, through villages, fantastic marshals, great supporters. You can even put your own prefered brand of sports drink out at the water stations!
Can't wait for Sunday!