Marcel Botnaru and Radu Baracu were working in the cradle at level nine of the Pennington Street building under construction on June 4 2020,

The support beams for the cradle had been fitted with the wrong sized end stops, which resulted in it rolling off the end and crashing to the ground below.

Botnaru suffered six broken ribs and a punctured lung while Baracu was off work for six weeks, but both were extremely fortunate to escape more serious and potentially life-threatening injuries.

Two companies, which specialise in the provision and installation of access equipment, were fined a total of £240,000 when they were sentenced at Croydon Magistrates Court.

The court heard how an HSE investigation found that Zarafa Height Solutions Limited failed to ensure that the support beams they manufactured were safe to use when they left their factory in Grantham.

A second company, Giraffe Access Company Limited, who installed the cradle and support beams at the London Docklands site failed to identify that they were defective during their safety checks prior to commissioning.

Both companies of Hungate, Pickering, North Yorkshire, are part of the Zarafa Group and pleaded guilty to safety breaches.

Zarafa Height Solutions Limited was fined £120,000 and was ordered to pay £3,987 costs and Giraffe Access Company Limited was fined £120,000 and was ordered to pay £3,996 costs.

The residential tower was under construction on Pennington Street in London

After the hearing, HSE inspector Kevin Smith said: “This incident could have ended in a double tragedy.

“Both of these men suffered injuries but were fortunate to escape with their lives.

“The fines imposed on these two companies should underline to everyone in the construction industry the importance of ensuring that rigorous safety checks are carried out on equipment before it is put to use”

“We will not hesitate to take action against companies which do not do all that they should to keep people safe.”