Just booked up for 3 separate 10k's in Bath during the year.
This will be a bit different as the out and back course goes through 2 disused railing tunnels. One of the tunnels is about 1mile long!! In total 4k will be underground... not for the claustrophobic!!!!
Whilst I have chosen the 10 k's, there are also 5k's, HM, FM and Ultra's in the running series.
Further details here if you're interested in something different