Green Motion London Heathrow Airport

Terrible experience with this company. We booked and paid in advance for a car through an online broker. Yet on arrival were told that we had to pay an extra 300 GBP because we were picking the car up late.
Then on returning the car they invented some tiny marks on the car and tried to charge us a further 400 GBP.
This place is a rip off. They use the fine print of the contract to screw their customers.
Look elsewhere for car hire.

I booked a car from this company from the US, and had a good price locked in. When we arrived in August 2014, they said that the price I had booked and prepaid was for only one week, not the two weeks that I had on my booking. The name they used for the booking was Ace. We had to pay for a taxi to get to their location.
I was unable to get them to give me the deal I had booked, so the price I paid was literally double what I should have been charged.
The car they provided was fine. At the end of the trip they charged me 90 pounds (approx $ 135) for a tiny scratch on the drivers door mirror. If I caused the scratch, I do not know. But I do know that it would have been easy to polish the scratch out, and the price they charged was truly excessive.

Regardless of the auto or their service, I can’t recommend this company. They don’t take American Express, but they allow people to to book cars using consolidators that do. Because of this, the cost of our car nearly doubled without warning; a vehicle we rented for £250 required an additional £150 for a required damage waiver (which is covered by American Express, and why I booked the car with them.) If I had known in advance this company did not use American Express, I would not have booked a car with them. They also charged £40 for an additional driver, even though the person at the counter said this was a mistake and insisted they would remove the overcharge; my credit card ended up refunding that charge on 25 August.
Update — they charged my credit card another $ 131 on 19 July, that is almost a month after we came home!!! According to the comment below from 13 August (nearly a month later again), this was a charge from the South Wales police, probably a camera that also ticketed the car in front of us. This is how they do business… charge you on the sly, even for legitimate reasons, explain later on Unilocal.One star, you take your chances with this company.