Keep an eye on airline guidance for terminal changes; adapt your route accordingly by alighting at the correct station

https://www.scribd.com/document/1074894734/Heathrow-Drop-Off-Charges-and-Pick-Up-Locations-Avoid-Fines-and-Hassles-212266

Keep an eye on airline guidance for terminal changes; adapt your route accordingly by alighting at the correct station to avoid backtracking within the airport.