Here are the reported incidents at 7:30 on 21 April for the Tube system:

WATERLOO AND CITY LINE: Suspended due to a signal failure at Waterloo. Valid London Underground tickets will be accepted on London Buses via any reasonable route. CENTRAL LINE: Severe delays are occurring due to a signal failure at Bank.

Dear Vincent (blog),

Here is your free Transport for London Travel Alert reported at 8:00 on 20 April.

Here are the reported incidents at 7:30 on 20 April for the Tube system:

No line incidents reported. BLACKFRIARS UNDERGROUND STATION: From Monday 2 March 2009 until late 2011, Network Rail is carrying out major improvements to the Underground station as part of the Thameslink Upgrade programme. District and Circle line trains will not stop at the station during this time. Please bear this in mind if purchasing a season ticket or registering your Oystercards.

Here are the reported incidents at 7:30 on 18 April for the Tube system:

DOCKLANDS LIGHT RAILWAY: Saturday 18 and Sunday 19 April, suspended between Bank and Mudchute, between Bank, Tower Gateway and Beckton and between Stratford and Mudchute. Rail replacement bus services operate.

Service one: between Bank and Island Gardens, calling at Tower Gateway, Shadwell, Limehouse, Westferry, Canary Wharf, South Quay, Crossharbour and Mudchute.

Here are the reported incidents at 7:30 on 17 April for the Tube system:

No line incidents reported. BLACKFRIARS UNDERGROUND STATION: From Monday 2 March 2009 until late 2011, Network Rail is carrying out major improvements to the Underground station as part of the Thameslink Upgrade programme. District and Circle line trains will not stop at the station during this time. Please bear this in mind if purchasing a season ticket or registering your Oystercards.

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Here are the reported incidents at 7:30 on 16 April for the Tube system:

DISTRICT LINE: Severe delays are occurring due to a person taken ill on a train earlier at Mansion House.

CIRCLE LINE: Severe delays are occurring clockwise due to a person taken ill on a train earlier at Mansion House.

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Here are the reported incidents at 7:30 on 15 April for the Tube system:

CIRCLE and HAMMERSMITH & CITY LINES: Minor delays are occurring due to an earlier signal failure at Moorgate.