Use terminal maps to plan your drop-off or pick-up point; some ride-hailing apps designate specific zones

https://telegra.ph/Heathrow-Terminal-2-Access-Trains-Tubes-Buses-and-DropOff-Points-08-17

Use terminal maps to plan your drop-off or pick-up point; some ride-hailing apps designate specific zones, and short-stay car parks are signed clearly.