The managing director of London Underground has apologised after suspending two tube lines this weekend due to the amount of staff self-isolating

Both the Circle and Hammersmith and City lines have been closed after 300 Tube workers were 'pinged' from the NHS Test and Trace app telling them to self-isolate, reports the Express.

The app has come under fire in recent weeks due to the number of people being 'pinged' despite many not testing positive for the virus.

Read more: NHS Test and Trace: 16 critical sectors where workers may not have to self-isolate when pinged

The Government is now set to change the self-isolation rules for those in critical sectors.

More than 600,000 people across England have been told to self-isolate after coming into contact with positive Covid cases.

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And today (July 24) the London Underground network is one of many sectors to have been affected.

Andy Lord, London Underground managing director, apologised for the closure of both tube lines.

He said: “We apologise to customers for the impact on Tube services, while we deal with staff shortages across the network due to self-isolation.

“We are committed to running a frequent and reliable service, but with a reduced number of staff available it's not always possible.

“I'd encourage anyone travelling in the coming days to check before they travel and thank them for bearing with us during this difficult time.”

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A number of other train networks have also been impacted by the 'pingdemic' as Thameslink, Southern Rail, London Northwestern Railway and Avanti West Coast.

London Northwestern Railway will introduce a revised timetable with fewer services from Saturday.

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