It seems to be flanked by the tour of cotswolds and the dragon ride so maybe a local spin is best for me. Toks is among a so far small entry list for 170K and other distances. We now know that as catagery C (40+) he is a youthful vet or lying about his age to secure a gold award!! (Not serious Toks) - you're an example to old and young alike.
If you are interested check out the latest Fred Cast (7) at
http://www.thefredcast.com/.
This is a podcast from USA, California, about riding your first Century (100miles) Plenty of good advice if a somewhat anal approach to cycling.
Enjoy the ride
Alan