Heathrow is the busiest airport in the UK and the third busiest airport in the world (as of from 2012) in terms of total passenger traffic, handling more international passengers than any other airport on the planet. With over 200,000 passengers a day and 76,000 staff employed on-site

The importance of a dedicated communications link as part of an emergency plan is recognised within the Canary Wharf development that includes the UK’s highest tower, One Canada Square. At a height of 800 feet (244 metres), One Canada Square is equipped with 256 fire telephones provid