Muslim prayer room in London (LHR), England airport

There are plenty of Muslim prayer rooms in Heathrow airport.They have it in almost every terminal in every Hall.

• Terminal 2: departures (after security), near Gate A21
• Terminal 2: T2B (after security), between Gates B34 and B35
• Terminal 3: departures, Level 1 (before security)
• Terminal 3: departures (after security), near Lounge A
• Terminal 4: mezzanine floor (before security), near Yotel
• Terminal 4: departures (after security), near Gates 3 and 4
• Terminal 5: check-in Zone A (before security)
• Terminal 5: departures (after security), near Gate A8
• Terminal 5: T5B (after security), near Gate B34
• Terminal 5: T5C (after security), near Gate C52