1. Which terminal would the preclearance facility be located in? All of them?

2. For each terminal, which gates would you block off to be used for US flights only instead of the current flexible working? How would that work with lounges and shops? Doesn't Heathrow want passengers to spend as long as possible in the shopping areas?

3. There are many connecting passengers to the US, on Star and Skyteam it will be on two different airlines, while oneworld often involves a change of terminal. Will airlines want the MCT to increase by an hour or more?

4. Will people be willing to pay higher fares (or higher fees to LHR bundled into the fares / even higher co-pay for redemptions) to offset the running costs and to pay back the construction costs? Would it be more profitable for airlines and LHR to just raise fares and not spend the extra money on creating preclearance facilities?