I haven’t tried these, but if you’re looking for an activity to take advantage of autumn, you might try a free guided walk around London. Some of the ones offered by Walk London which include:
- a 2 hour walk through historic Bloomsbury on September 28th
- a 2 hour walk covering Old Westminster-1000 years of History
- a 9hour tour on London’s first long distance footpath (the Green Chain Walk) which says “for much of the walk you won’t know you are in any city, let alone the Metropolis”