Crossrail has introduced regular testing at its Tunnelling and Underground Construction Academy after training was disrupted by COVID-19 outbreaks.
The academy in Ilford, east London, is run by Transport for London (TfL) and provides specialist training in tunnelling and underground construction.
Papers released ahead of a TfL board meeting said that coronavirus cases at the facility had led to increased pressure on the delivery of the Elizabeth line.
They said: “Although good progress is being made, the impact of the coronavirus pandemic is still being felt with absence of specialist trainers, trainees and availability of training facilities. There has been a number of positive COVID-19 cases at the Tunnelling and Underground Construction Academy, which has increased the pressure on training but we do remain on track.