HalfMarathons -Recommendations?

[robertf]

Andy and all -

Following suggestions from Andy on another thread on this forum I have now made the - very scary for me - decision to set my next goal on running my first half-marathon, ideally in the Spring or early Summer. Up until now my maximum distance is 10k.

So, can anyone recommend a good first half marathon race in London or the South East? Is there something like the Nike 10k? eg: well organised , mass participation event, mixture of beginners and experienced runners?

thanks
Robert