We booked with Mayfair Parking through Ezybook. It was a terrible experience with an extremely poor service and disingenuous business model. After landing back in the UK, we realised we can't get our car, as they have lost the keys to our car. The company refused to help us get home at midnight, forcing us to take a taxi. Next day, we realised Mayfair had dropped the keys in another customer's car, who contacted us. Based on the documents with the car key, they parked our car on a street in Slough and not in a secure car park. I have the copy of the document where they have mentioned which street they parked my car in. They say on the website that they have a secure car park, CCTV, patrols, etc. All lies. You are better off using official airport parking services. At least your car will be safe, even if it's expensive. Do not trust such companies. Mayfair Parking are yet to respond to my request to refund my taxi fare. By the way, their company policy is that they only respond to emails and no phone calls. The standard SLA for reply to emails is 14 days. Seems an ideal way not to deal with customers.