I'm in Portsmouth, have you considered a walk in the South. There are many good routes to follow.
If not, if you are taking your car, either hike a circular walk or try to decide on one where you can get back to it easily.
The Cotswold Way might be to your liking, trains at both ends, starts at Chipping Camden and finishes at Bath, plus a really great stone barrow en-route.
November, long nights and short days, that needs planning for.
Are you camping or B&Bing?