The subcontractor fell from height at the site near Victoria station at around 4pm on Saturday afternoon.

A Land Securities spokeswoman said: “We can confirm that there was an incident at our Nova Victoria site on Saturday.

“A subcontractor was involved in a fall at the site and sustained multiple injuries. He is currently in a stable, but critical condition in hospital. We are fully co-operating with all the relevant authorities.”

Mace referred Construction News’ enquiries to Land Securities.

Both parties refused to provide further detail on the extent of the man’s injuries.

The man was taken to a major trauma centre following the incident, after being attended to by London’s air ambulance, ambulance and joint response units.

Great team work earlier today with @LAS_HART @LDNairamb a patient fell from height. Taken to a Major Trauma Centre. pic.twitter.com/2lvg7oPvco

— Joint Response Units (@LAS_JRU) 16 April 2016

The Metropolitan Police and the Health and Safety Executive both confirmed they were investigating the incident.

Mace started work on site in June 2013. The £380m project is due to complete in September.