Boris Johnson joined around 10 apprentices this morning for a lesson in concrete spraying.
With Crossrail and many other large-scale tunnelling projects in the pipeline the demand for skilled tunnelling and underground workers in the UK and Europe is unprecedented.
The Tunneling and Underground Construction Academy (TUCA) was established in 2011 by Crossrail, to address a shortage of people with the necessary skills to work underground on the transport scheme and on other planned infrastructure projects
More top news
Lynsay Coventry is the first serving NHS midwife in England whose death has been publicly confirmed.
When will the UK end lockdown? What needs to happen before the lockdown can end? Who will decide when lockdown ends?
London's mayor tweeted that "lives depended" on people following Government rules to stay at home unless travel was essential.