The Excess Baggage company runs the lost property office at Gatwick Airport,
and they have a website called lostproperty.org where passengers can connect with
them. It takes between 24 and 48 hours for discovered items to be registered, but all
items are held for up to three months.
Any passenger who has lost an item on board with BA, easyjet or Emirates should
contact the airline directly.
When a passenger informs the company of the lost property, they will be contacted
with a reference number to make collecting the item a simple process. Found items can
be collected in person, or they can be posted.