Susie- I was the same last year, returning to my home town for the inaugural 10k.
Nice fast, flat course and good conditions resulted in a nice PB! I expect there will be a bigger field this year, only about 1000 last year which is poor for a fairly big city!
I am not running this year as recovering from Dartmoor Vale marathon Sunday before last. Don't think the legs could handle a pacey run. Good luck.