Stephen Joseph, chief executive of the Campaign for Better Transport, has welcomed the announcement of a trial of season tickets for part-time workers in London.
He is calling for the scheme to be introduced quickly and rolled out across the commuter network.
More top news
John Cantlie, who worked for a number of Fleet Street newspapers, is thought to have been taken hostage in November 2012.
The union published a 'no show' league table for last year the worst offenders for cancellations.
Zalkalns was jailed in his native Latvia for eight years in 1988 after he admitted killing his wife with a piece of electrical equipment.