The Court at the Old Bailey heard that on 21st January 2011 the men were constructing a large steel structure as part of the foundation for a £1.5m large pressure test facility (PTF) at Claxton Engineering Services in Great Yarmouth.
The structure, which weighed 13 tonnes at the time, collapsed on top of the group. A large-scale emergency response took place to try and rescue the trapped workers. Adam Taylor, 28, Peter Johnson, 41, and brothers Thomas Hazelton, 26 and Daniel Hazelton, 30, were all pronounced dead at the scene.
The excavation for the horizontal PTF was more than 23 metres long, 3 metres wide and 2 metres deep. The horizontal steel cage being constructed would have weighed about 32 tonnes when completed.
The group were working for Hazegood Construction Ltd. Daniel Hazelton was an employee, while the other three were self-employed contractors. Encompass Project Management Ltd was the principal contractor, with Hazegood operating as a subcontractor.
A Health & Safety Executive (HSE) investigation found serious flaws in the planning, management and monitoring of the project on the part of Claxton as well as Encompass and its company director David Groucott.
Claxton Engineering Services Ltd of Ferryside, Ferry Road, Norwich pleaded guilty to breaching Regulation 9(1)(a) of the Construction (Design and Management) Regulations 2007. The company was fined £500,000 and ordered to pay costs of £100,000.
Encompass Project Management Ltd of The Gables, Old Market Street, Thetford, Norfolk pleaded guilty to breaching Section 3 (1) of the Health and Safety at Work etc Act 1974. It was fined £200,000 and ordered to pay costs of £50,000.
David Groucott of Diss, Norfolk, pleaded guilty to breaching Section 37(1) of Health and Safety at Work Act. He was sentenced to seven and a half months in prison, suspended for two years. He was ordered to complete 200 hours of unpaid community work within 12 months, and also ordered to pay costs of £7,500.
Charges against Hazegood Construction Ltd were ordered to lie on file.
HSE Construction Division head of operations Annette Hall said: “Those sentenced today failed the four workers who died. They didn’t carry out their legal duties, leading to the events which caused their deaths.
“This was a long term, large scale and complex civil engineering project which needed to be planned, designed, managed and monitored effectively. The tragedy here is that, in the months leading up to the accident, any one of these parties could and should have asked basic questions about building the structure safely. Such an intervention could have avoided the tragic outcome of this entirely preventable accident.”
Pictured above is the steelwork structure before its collapse