Less than a week after a Tube meltdown that left thousands of commuters fuming, the system this morning (October 13) was again hit by a signal failure.

The same four lines hit last Wednesday are also affected by signalling problems at King’s Cross. TfL says that tickets are being accepted on local buses for those affected.

The latest update from TfL is:

Metropolitan line: No service between Baker Street and Aldgate. Severe delays between Wembley Park and Baker Street and minor on the rest of the line due to a signal failure at King’s Cross.

Hammersmith and City line: Severe delays due to a signal failure at King’s Cross.

Circle line: Severe delays due to a signal failure at King’s Cross.

District line: Minor delays between Earl's Court and Richmond / Ealing Broadway due to an earlier signal failure on the Circle and Hammersmith & City lines.

Last week London Underground apologised for the delays and promised refunds while the RMT blamed a cuts programme and sought a “summit” to tackle the issues.

All this comes just days after Mike Brown became TfL Commissioner saying: “It is vital that we continue to invest, deliver even greater efficiencies and develop our commercial revenue, to support more jobs, homes and ensure London remains the engine of the UK economy.”

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It was under his watch, as former managing director of London Underground, that a contract to modernise signalling collapsed last year, costing taxpayers £100million.

The project is five years behind schedule and is aimed at increasing capacity on the Circle and Hammersmith & City lines by 65%, the District line by 24% and the Metropolitan line by 27%. These lines handle around 40% of London Underground traffic.