9+3=10

8km around Delamere from the station, then optional add on extra 2km as a stretch (assuming I can make a suitable route, we'll be back at the station at 8km, then an extra optional jog up OP and back to reach 10km).

UPDATE! My recce was closer to 9-10km from the station, then extra 2.5 up OP! (That final bit really will be optional!)

Further update - due to me having got a lurgy, Rich Monksmith has kindly agreed to lead instead of me...perhaps it's a magical mystery tour, but I'm sure you'll be well looked after!