A little longer than usual - building up the mileage.
Take the normal route along the A4 and through Compton Bassett to warm up the legs.
Follow the road through Bushton and loop towards Royal Wooton Bassett. Up through Tockenham and down to Grittenham.
Follow the road through Dauntsey and turn off towards Foxham. Through Foxham towards Spirt Hill.
The only big climb up Spirt Hill and then across the ridge and down back towards Calne.