Travel journalist: 'lt's a constant game of three-dimensional chess'
Passengers are facing disruption with some flights suspended after a computer failure at the UK's air traffic control centre.
Travel journalist Simon Calder told the BBC that air traffic control over London was "a constant game of three-dimensional chess".
He said the impact of the failure on the busiest travel day of the week, Friday, meant that cancellations will quickly build up.
12 Dec 2014
- From the section UK