Dropping someone off at UK airports often costs around £6.51 on average, but...

https://wiki-zine.win/index.php/Gatwick_Pick_Up_Is_Through_Short_Stay_%E2%80%93_So_How_Much_Can_It_Cost%3F

Dropping someone off at UK airports often costs around £6.51 on average, but places like Gatwick charge up to £10, and Heathrow £7. We break down these fees, including pick-up costs, so you can plan ahead