There is a left luggage facility at the far right side of the terminal beyond the check-in area. It is open 05:00 to 22:00 on weekdays, 05:00 to to 13:00 on Saturday and 11:00 to 22:00 on Sunday.
To use this facility, go to the Information Desk to get a receipt then to Left Luggage to drop your bags. When picking up bags, first take your receipt to the Information Desk to pay, then take the stamped receipt to the Left Luggage area.
It costs £10 per item per 24 hours.
The Information Desk can be contacted on (020) 7646 0000.