GLH Hotels Management Ltd 2nd Floor, Stephenson House, 75 Hampstead Road London, NW1 2PL United Kingdom Phone: +44 20 7554 3890 Fax: +44 84 5040 5768 Visit Website The new Amba Hotel Charing Cross, the first Amba Hotel worldwide, is now open. Situated just steps from Trafalgar Square, the hotel offers the fastest Wi-Fi in the world in any Meetings & Events hotels, with no limits on uploads and download speeds.