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

https://www.bookmark-suggest.win/dropping-someone-off-at-uk-airports-usually-costs-around-6-51-but-at-spots

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