“I read reviews before I booked. Having booked APH at Gatwick before decided to go with them at Heathrow although they were more expensive. What I didn’t realize was if you don’t arrive on time (we got lost trying to find them) that you have to pay extra for parking. If you choose APH make sure you are there on time or you will have extra parking charges. You must arrive in your 15 minute time slot. Would I book with them at Heathrow again - not sure. If the other quotes were cheaper I’d probably go with them instead due to the fact they all charge extra if you are late.”