The deal will be recommended for approval by union members

Union bosses will ask their members to approve the proposal on staffing levels reached during talks with LU managers.

Rail, Maritime and Transport (RMT) union general secretary Bob Crow said the agreement over the shorter working week met with its safety concerns.

A number of stations were closed when workers staged 24-hour strikes on New Year's Eve and 9 January.

Safety guarantees

The RMT had said new rotas for a 35-hour week would leave some stations dangerously understaffed.

LU has said the new rotas, due to come into effect on 5 February, would not compromise safety.

Managing director Tim O'Toole said: "The agreement that will be implemented is exactly the same as it was before the RMT strike action.

"The only purpose the strikes served was to inconvenience Londoners."

He said the new deal would ensure safe staffing levels at all Tube stations and added there would be no job cuts and no extra cost to travellers.

Mr Crow said the proposed agreement would be recommended for approval in the ballot but warned of future action if it was rejected.

He said: "We have now negotiated a deal to give us the safety validation we sought from the beginning of the dispute."

More than 4,000 RMT station staff will vote the proposal, with a result due at the end of the month.