Can I make a suggestion which might work. How about having a 10k handicap. Everybody declares their 10k PB, any new members who have never run a 10k get given a nominal time of say 60-65 mins or so. We all pay a couple of quid to enter, hold a 1 minute silence at the beginning, start the race at 11.11 and give all the proceeds to the British Legion. We could all meet up for a coffee afterwards. That way it would get the club newcomers involved and theoretically we should all have an equal chance of winning.
I know it spoils the symettry but what about holding it on the Saturday 12th and that way everybody could get involved.