Dropping someone off at a UK airport can cost more than you think—average fees...

https://www.generate-bookmark.win/heading-to-a-uk-airport-soon-dropping-someone-off-can-cost-an-average-of

Dropping someone off at a UK airport can cost more than you think—average fees hit around £6.51, with Gatwick charging up to £10 and Heathrow about £7