as per above, i think if you'ren ot prepared about the time or people going past you, you should be ok, just find your steady pace and settle in. also remember that once you get about 5 miles in, you're at your highest pointy, and its all downhill from there (or on the flat).
its my first ever 'race' at this leeds half, i cant wait, although im getting a bit nervous now, ive done the mielage well in training but it wont be the same. the original plan was just to do it without stopping, which still holds, but i did it in under 2 hours in training tother week, so somewhere similar would do me fine! this weeks going to drag though, especially with just a couple of short runs to keep me ticking over!