Dropping someone off at UK airports can add up—expect around £6.51 on average,...

https://touch-wiki.win/index.php/Is_Manchester_Airport_Drop_Off_Really_%C2%A35.50%3F

Dropping someone off at UK airports can add up—expect around £6.51 on average, with Gatwick charging £10 and Heathrow £7. But pick-up fees can be different, so it’s worth checking both