Dropping someone off at a UK airport can cost you more than you might...

https://archervezi838.lowescouponn.com/why-do-people-think-getting-a-lift-is-cheaper-when-it-often-isn-t

Dropping someone off at a UK airport can cost you more than you might think—take Gatwick, where it’s around £10 just to stop briefly. Heathrow’s about £7, with average fees across airports around £6.51