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Tube workers are to stage two strikes next month in a row over jobs and ticket office closures.

Members of the Rail, Maritime and Transport union (RMT) will walk out for 16 hours from 6pm on February 5 and for 15 hours from 10am on the 7th.

The strike was announced after talks between transport bosses and the union broke down this afternoon.

The RMT and Transport Salaried Staffs' Association (TSSA) staged a 24-hour strike earlier this month which crippled Tube services.

The RMT said it is also planning further strikes in March.

Over 3,000 RMT station staff members were balloted for action over the impact on safety from the axing of nearly 900 front-line workers alongside the closure of Tube ticket offices.

Tube strike chaos 17 show all Tube strike chaos 1/17 Chaos as commuters battle to get to work during the Tube strike Crowds of commuters at Liverpool Street station Jeremy Selwyn 2/17 Chaos as commuters battle to get to work during the Tube strike Crowds of commuters at Liverpool Street station Jeremy Selwyn 3/17 Chaos as commuters battle to get to work during the Tube strike Crowds of commuters at Liverpool Street station Jeremy Selwyn 4/17 Chaos as commuters battle to get to work during the Tube strike Crowds of commuters at Liverpool Street station Jeremy Selwyn 5/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get to work at Clapham Junction station @joeylangran/Twitter 6/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get to work at Clapham Junction station @toomuchxtoofast/Twitter 7/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get to work at Clapham Junction station @tomb8man/Twitter 8/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get to work at Clapham Junction station @al_smyth/Twitter 9/17 Chaos as commuters battle to get to work during the Tube strike Commuters at King's Cross station during the Tube strike Alex Hooper 10/17 Chaos as commuters battle to get to work during the Tube strike Commuters fail to get on a crowded bus outside King's Cross during the Tube strike @JSavageTweets/Twitter 11/17 Chaos as commuters battle to get to work during the Tube strike Commuters at London Bridge during the Tube strike @KrisIngham1/Twitter 12/17 Chaos as commuters battle to get to work during the Tube strike Commuters at Stratford during the Tube strike @abigailporterxo/Twitter 13/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get on the DLR from Stratford to Canary Wharf @bradders_xx/Twitter 14/17 Chaos as commuters battle to get to work during the Tube strike The queue at Wimbledon station as commuters brave the Tube strike @marcelleau/Twitter 15/17 Chaos as commuters battle to get to work during the Tube strike The queue at Hackney Central station as commuters brave the Tube strike @CaramelBear81/Twitter 16/17 Chaos as commuters battle to get to work during the Tube strike Commuters wait for a bus in Golders Green @melaniewatts 17/17 Chaos as commuters battle to get to work during the Tube strike Commuters queue for taxis at Paddington station @sharon_timms1 1/17 Chaos as commuters battle to get to work during the Tube strike Crowds of commuters at Liverpool Street station Jeremy Selwyn 2/17 Chaos as commuters battle to get to work during the Tube strike Crowds of commuters at Liverpool Street station Jeremy Selwyn 3/17 Chaos as commuters battle to get to work during the Tube strike Crowds of commuters at Liverpool Street station Jeremy Selwyn 4/17 Chaos as commuters battle to get to work during the Tube strike Crowds of commuters at Liverpool Street station Jeremy Selwyn 5/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get to work at Clapham Junction station @joeylangran/Twitter 6/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get to work at Clapham Junction station @toomuchxtoofast/Twitter 7/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get to work at Clapham Junction station @tomb8man/Twitter 8/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get to work at Clapham Junction station @al_smyth/Twitter 9/17 Chaos as commuters battle to get to work during the Tube strike Commuters at King's Cross station during the Tube strike Alex Hooper 10/17 Chaos as commuters battle to get to work during the Tube strike Commuters fail to get on a crowded bus outside King's Cross during the Tube strike @JSavageTweets/Twitter 11/17 Chaos as commuters battle to get to work during the Tube strike Commuters at London Bridge during the Tube strike @KrisIngham1/Twitter 12/17 Chaos as commuters battle to get to work during the Tube strike Commuters at Stratford during the Tube strike @abigailporterxo/Twitter 13/17 Chaos as commuters battle to get to work during the Tube strike Commuters battle to get on the DLR from Stratford to Canary Wharf @bradders_xx/Twitter 14/17 Chaos as commuters battle to get to work during the Tube strike The queue at Wimbledon station as commuters brave the Tube strike @marcelleau/Twitter 15/17 Chaos as commuters battle to get to work during the Tube strike The queue at Hackney Central station as commuters brave the Tube strike @CaramelBear81/Twitter 16/17 Chaos as commuters battle to get to work during the Tube strike Commuters wait for a bus in Golders Green @melaniewatts 17/17 Chaos as commuters battle to get to work during the Tube strike Commuters queue for taxis at Paddington station @sharon_timms1

The unions have warned that the job cuts have left safety on a "knife edge" with repeated reports of dangerous overcrowding on stations and platforms.

Union members have been banning overtime, which they say has exposed the "massive deficiencies" in station staffing.

Mick Cash, RMT general secretary, said: "RMT will not stand by while safety is compromised on London Underground off the back of cash-led cuts to staffing levels that the union has warned would have a serious, lasting and corrosive impact for staff and passengers alike. That is why our members are taking this further action.

"RMT members on the London Underground stations see day in and day out the toxic impact of the job cuts programme and they are reporting back that it is horrific.

"It has now also been shown that at management level there is agreement with the union that the cuts have been a disastrous mistake.

"With the constant overcrowding on stations and platforms it is only a matter of time before there is a major tragedy if we don't act decisively.

"Our dispute is about taking action to haul back the cuts machine and put safety back at the top of the agenda.

"The union remains available for further serious talks."

Steve Griffiths, London Underground’s Chief Operating Officer, said: "This threat of strike action is completely unnecessary. We invited both unions to continue talks at ACAS today in a bid to resolve this dispute.

"We are still in talks with the TSSA union but the RMT refused to join us today.

"We urge the RMT to continue talking to us so that we can reach a resolution.”