The Ridgeway is pleasant if very untechnical. It can get very windy (note Ridgeway) and bare chalk on a couple of hills is lethal when wet/damp. Farm traffic and horses can make the Southern part of it very muddy. The Ridgeway double route is great – takes in the Icknield way which is a bit more interesting.
Sunny summers day – great.
November – I’m local – I don’t ride the bit South/West of Goring.
Another long distance track is Swan’s way great apart from the Milton Keynes bit.
Someone ought to make up a Chilterns Loop.