The man, employed as a mechanical engineer by EMC Elite Engineering Services Ltd, had been repairing a conveyor at the site on Chalfont Lane, West Hyde when he fell 11 metres on 20 November 2022.

Stair treads had been removed in the conveyor’s stairway to ensure it could be supported by a crane during the repair work, resulting in a gap in the stairway.

The man, who was 57 at the time, fell through this gap and landed on the concrete floor below, sustaining a fractured pelvis, skull, hip, jaw and two broken wrists.

He spent two months in hospital following the incident, undergoing surgery requiring him to have six plates inserted into his face.

An HSE investigation found that EMC Elite Engineering Services Ltd failed to ensure the work at height was properly planned, appropriately supervised, and carried out in a manner that was as safe as reasonably practicable.

The worker said in his victim personal statement: “The injuries I sustained have had a massive impact on my life and some of these will be permanent. The impact on my family relationships has been massive. My wife has become my carer.

“My own behaviours have changed. I am quicker to anger and get easily frustrated. I get very impatient too. My focus has been affected and I struggle to keep up with a task or maintain a conversation.”

EMC Elite Engineering Services Ltd, of Basildon, Essex pleaded guilty to safety breaches and was fined £52,500 and ordered to pay £6,871.12 in costs at St Albans Magistrates’ Court.

HSE inspector Martin Paren said: “This incident led to an employee suffering multiple injuries that will affect him for the rest of his life. If his employer had properly planned, instructed and supervised the work then this incident could have easily been prevented.