Now in its 15th year, the event is being held in partnership with Barclaycard Fuel+ in association with TMC, and is being this year at the stunning Heythrop Park Hotel and the Heythrop Park Resort near Enstone in Oxfordshire.

Highlights of the event include a 600cc Caterham Suzuki and a 20-year-old Mondeo as part of a line-up from Ford Heritage.

Electric vehicles putting their eco credentials to the test and taking advantage of charging stations along the way include a Kia Soul EV and a BMW i3.

But perhaps the most unusual vehicle seen at this year's event, which is also being co-sponsored by ALD Automotive and TRACKER, has been the drone used to undertake filming by sponsors Barclaycard Fuel+.

Don't forget you can follow the cars online! Head to http://www.tracker.co.uk/mpgmarathon/