In reply to The New NickB:
> (In reply to yorkshireman)
> I just wish a lot of the people who do it realised there more events out there than this, the GNR, VLM and tough mudder type events, don't get me started on them!
I agree with you, but its hard to say this without seeming to put down beginners. Also, for many people who have never run a race before, it can be intimidating to turn up to a windswept fell-race with 6 specators and a dog, or a flat 10k on the outskirts of some god-forsaken industrial park on a Sunday morning where 95% of the entrants are pretty serious.
Hopefully the OP will see this as a gateway into a great pastime. If you can run 10km then you can pretty much do anything and he should feel confident enough now to start trying out where he wants to go next (fell, XC, fast-10kms etc, marathons, trail) without having to wait for the next big mass event.
When I lived in the UK I used to find the race finder on fetcheveryone.co.uk invaluable. There's a whole range on there so worth a look.
Finally, races are great for testing yourself and adding a bit of sociability, but the beauty of running is you can just go out and do it where or whenever you want - so keep doing that and you'll be happy for the most part.