By Laurence Dollimore For MailonlinePublished: 09:38 EDT, 17 July 2021 | Updated: 09:59 EDT, 17 July 2021A London Tube line has been suspended and two others partially closed due to a staff shortage triggered by workers being told to self-isolate by the NHS Covid-19 app. The Metropolitan Line was not running on Saturday after control room staff received an alert from the app in the morning telling them to stay at home. Services on the Piccadilly and District line were also affected, with partial closures to last until at least 9pm. 'This will also impact the Piccadilly line with no service between South Harrow and Uxbridge and no service on the District line between High Street Kensington and Edgware. The station is also serviced by the Jubilee line which was still running, while Wembley Stadium and Wembley Central stations are also near the ground.
