Travel

My wife and I toured parts of the UK for ten days in May and rented a car for parts of it.
Between time in London in the beginning and at the end, we took a train to Brighton and rented a car.
That took us to Plymouth, then Port Isaac, Tintagel, the Cotswolds, Oxford, Reading, then back to Heathrow to return the car.

We enjoyed the freedom a car provided but we overspent thinking at the last minute that we'd want a car with navigation only to learn that our phones maps were working fine. We would have saved some money there.

Driving on the left isn't so bad but many of the roads are so narrow, and turnouts so rare, that you really need to stay on alert while driving lest you miss a turn or brush a hedgerow with the left side of your car.

I think your destinations will tell you if the network of trains will work, and we did well with Uber when we needed it.

Good luck, have fun!