driver in london and environs

I am sorry that I can't, but do you know that each of those destinations is very easy to reach by fast train?

https://www.addisonlee.com/

It will cost a small fortune. Like Nigel so wisely says, most people would take the train.

Susan if by any chance you want to have a driver for any mobility issues, there are a number of ways to make train travel more accessible. I use them for my disabled wife. I would be happy to share knowledge if needed.

You all are certainly correct about the trains .
We were hoping to day trip out of Cambridge to burleigh house and then Stowe house on the way to Oxford .
Thanks for all suggestions

For Burghley House use Stamford station then taxi, or hourly bus 201/202 from Peterborough or Stamford.

Stowe is a 3 mile taxi ride from the closest bus stops in the town of Buckingham- which is on the X5 bus route from Milton Keynes station to Oxford.