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
Calum McSwiggan posted a photo on Instagram as he lay in a hospital bed after the alleged attack.
The London mayor publicly backed defeated candidate Owen Smith in the contest which saw Mr Corbyn re-elected party leader.
Police described it as a "growing sink hole" and it's unclear when the road will reopen.