A £30 million Tube pay deal that will give the lowest paid staff an 11 per cent increase has been accepted by four transport unions.

London Mayor Sadiq Khan welcomed the news as “a reminder of what can be achieved when you engage and talk with transport workers.”

Transport for London’s (TfL) offer provides a basic 5 per cent increase plus a lump sum of up to £1,400.

RMT had threatened a rolling walkout by 10,000 members in the first week in January.

TfL commissioner Andy Lord had warned unions preparing to strike that a 5 per cent rise was his “full and final offer.”

But the mayor averted the disruption by funding the lump sums with an £30m extra from business rates and council tax.

All 16,500 London Underground staff will now have the pay boost backdated to last April after Unite and the TSSA followed the RMT and Aslef in accepting the offer.

Unite general secretary Sharon Graham said: “This was an important pay deal which was secured by workers standing firm and ensuring an improved offer was made.

“Unite always prioritises the job, pay and conditions of its members and is why the union will always give its full support to other workers on London’s transport network who fully deserve a fair pay increase.”

Steve O’Donnell, Unite’s regional secretary for London and Eastern, said: “This pay deal was an important step forward but it is far from the end of the road.

“Unite will ensure that TfL and the Mayor’s Office make decent pay offers for all public sector transport workers in London.”