In reply to all:
Bit of an update...
Tried to get a place in the Brass Monkey HM (entries opened 06:00 22/10/16) but it was sold out by around 6:01(ish)...so I missed out. I had heard that it was hard to get an entry, but I didn't realise just how popular it was!
To console myself I've entered (successfully!) the Wilmslow HM in Mar '17 and also the Leeds Abbey Dash 10k on 6th Nov. Never done a 10k before (advice welcomely received!) - treating it as a bit of 'speed training' for the HM.
Current plan for HM is to train a mix of; intervals (up to about 1km), hill reps (short! <2mins) plus the usual mix of runs between 4 and 11 miles over the next few months. Aiming to knock around 2m30s off my HM time. Fingers crossed...