If you're returning some equipment by post or courier, the address is:
It's our local courier office, and they bring our piles of incoming lenses round to us once or twice a day.
If you want to return a lens in person, rather than by post, you can drop it in at JCA at the above address. Please note they are open from 8.30am to 6pm Monday to Friday. Here is a map to help you find the office.
JCA Couriers, 27 All Saints Avenue, Maidenhead SL6 6LX. Opening hours: Monday-Friday 08.30-18.00. There is plenty of space to park on All Saints Avenue. The entrance to the reception office is at the back of the loading yard.