A London interior fit-out company has been fined for safety failings after a worker suffered life-changing injuries when he fell through a fragile roof light at a construction site in Kensington.

The 46-year-old worker broke three vertebrae, his right shoulder blade and several ribs in the fall at a property undergoing redevelopment in Rutland Gate, Kensington, on 3 February 2011.

The married father-of-four is unlikely to be able to return to manual work as a result of the injuries.

Westminster Magistrates’ Court heard on 27 February that he was carrying out insulation work on a flat roof for Shoreditch-based Sherlock Interiors Contracting Ltd. He fell through one of the roof lights before landing on teh floor 6m below.

The Health & Safety Executive (HSE) investigated and found that board coverings previously installed over the roof lights had been removed and replaced with thin plastic sheeting. In addition, safety decking beneath the roof – designed to protect workers in the event of a fall – was no longer in place when the man started work.

The fall could have been prevented had the risks been properly assessed and had the work been better planned and managed, the court decided.

Sherlock Interiors Contracting Ltd, of Vestry Street, London N1, was fined £8,000 and ordered to pay £5,347 in costs after pleading guilty to breaching Regulation 9(1) of the Work at Height Regulations 2005.

After the hearing, HSE inspector Peter Collingwood said: "Work at height is inherently fraught with risk, and falls remain the single biggest cause of deaths and serious injury in the construction industry.

“It is therefore essential that effective management arrangements are in place to ensure risks are managed and workers are protected. Fragile roof covers provide little or no protection and should be viewed with the same level of danger as an open void.”

Latest HSE statistics show that 40 workers were killed and more than 3,400 were seriously injured in falls from height in 2011/12. Further information on safe working at height can be found online at the website below.