Here are the reported incidents at 7:30 on 28 February for the Tube system:

CIRCLE LINE: Saturday 28 February and Sunday 1 March, suspended.

HAMMERSMITH & CITY LINE: Severe delays are occurring due to late finish of engineering work.

JUBILEE LINE: Saturday 28 February, suspended between Stratford and Green Park until 1500. Two rail replacement bus services operate.

Here are the reported incidents at 7:30 on 27 February for the Tube system:

BAKERLOO LINE: Suspended between Lambeth North and Elephant & Castle due to a signal failure at Elephant & Castle. Minor delays are occurring on the rest of the line.
London Underground tickets are being accepted on local buses.

Here are the reported incidents at 7:30 on 26 February for the Tube system:

METROPOLITAN LINE: Minor delays are occurring on the Uxbridge Branch due to an earlier signal failure at Ickenham.

DOCKLANDS LIGHT RAILWAY: Minor delays are occurring due to a signal failure at Poplar.
London Underground is accepting valid tickets via resonable routes.

Here are the reported incidents at 7:30 on 25 February for the Tube system:

Here are the reported incidents at 7:30 on 24 February for the Tube system:

PICCADILLY LINE: Minor delays are occurring on the Uxbridge branch due to an earlier signal failure at Ealing Common.

Dear Vincent (blog),

Here is your free Transport for London Travel Alert reported at 8:00 on 23 February.

Here are the reported incidents at 7:30 on 23 February for the Tube system:

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

CIRCLE LINE: Saturday 21 and Sunday 22 February, suspended.

WATERLOO & CITY LINE: Saturday 21 February, suspended.

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

BAKERLOO LINE: Suspended between Lambeth North and Elephant & Castle, with minor delays on the rest of the line due to a signal failure at Elephant & Castle.

PICCADILLY LINE: Suspended between Heathrow Terminals 1, 2, 3 and Terminal 5 due to a signal failure at Terminal 5. Minor delays occurring between Acton Town and Heathrow Terminals 1, 2 and 3.

Here are the reported incidents at 7:30 on 19 February for the Tube system:

No line incidents reported.
BOUNDS GREEN STATION: The down escalator at Bounds Green station is out of service.

If you are unable to use the stairs, please use the following buses to Wood Green station:

Bus 221 from bus stop BA on Bounds Green Road.