Cotswolds

It's possible, but it would be a long day, and an expensive one probably. I've never taken a Rabbie's tour, but I've seen them recommended on this forum. Looks like you would be paying close to 120 GBP each in August.

Doing it yourself by train from Paddington Station to Moreton in Marsh, round trip tickets would be 100 GBP for two people on a random day in July--August schedules aren't up yet. It takes about 90 minutes each way. Then you need to get yourself from MIM to other towns by whatever means you can--taxi or bus.

There are minivan tours departing from Morton-In-Marsh early in the mornings, but you'd have to get up pretty early in the morning in London to get there. Hours before breakfast, and hurry to the train station. The train must first go through Oxford and then on to Morton, so it's not as though the Cotswolds are on the doorstep of London.

A better option would be to go with Rabbies Tours, as someone else just mentioned, leaving from Victoria Coach Station in London.

Another option is to go with the London Walks Company, leaving from London with a guide.

Yet another option is Evan Evans Tours, out of London.

A quick Google search for these will give you the websites so you see if any of these suit you.

Yet another option would be to leave London, spend the night in Moreton, catch a minibus tour the next morning early from there.

I highly recommend: Go Cotswolds, owned and run by a family who live in Stratford-Upon-Avon.
My husband and I have been on several of their tours. Excellent! The tour makes several stops with time for you to explore each village on foot. There are 2 different tour routes. I've been on both and prefer the first one listed here. I can make recommendations in each village for lunch or coffee or tea plus cake break mid-afternoon, if you wish.

https://www.gocotswolds.co.uk/product/cotswolds-in-a-day/

https://www.gocotswolds.co.uk/product/secret-cotswolds/

I took the gocotswalls.com tour out of Morton in the beginning of April 2025. It was the perfect tour for me. I checked out other options and gocotswolds had exactly what I wanted. The guide was fabulous, the van was comfortable the towns were delightful and just enough in each. Excellent recommendation for gocotswolds.com.

We rented a car and stayed at Chipping Campden and toured the Cotswolds for two full days.
You can't do it by train.
Either take a tour or rent a car.

Google cotswolds by bus and it will give you a couple of options for tours with exact timetables for the buses you need to take. Probably not ideal but apparently can be done.