Talks aimed at avoiding tomorrow’s tube strike by London Underground (LU) workers have resumed.
Officials from the RMT and TSSA unions are meeting LU bosses at conciliation service Acas to try to resolve the row over ticket office closures.
Union members staged a 48-hour walkout last week, which meant the Metropolitan Line did not run services to and from Watford.
Another 48-hour strike is planned from 9.30pm tomorrow unless a deal can be agreed.
Transport for London said there was no deadline for the talks.