A specialist crane supplier has been fined £180,000 after a worker was killed when a large steel beam fell on him at an incinerator in Slough, Berkshire.

Colin Dickson, 38, of Motherwell, died when the temporary suspension points on a suspended beam he was under failed. The 1.4 tonne beam fell five metres onto Mr Dickson causing fatal injuries to his chest, and fractures to his legs and back.

The Health and Safety Executive (HSE) prosecuted Mr Dickson's employers J H Carruthers Ltd and one of its supervisors after an investigation into how the lifting operation failed.

The HSE investigation found that the lifting operation could have been successful if the whole process had been planned, appropriately supervised and carried out in a safe manner from the outset.

HSE's Inspector Karen Morris said:

"This tragic incident shows the importance of carrying out a thorough assessment of hazards and properly managing all lifting operations. This was a complex and unusual lift which went drastically wrong due to a lack of competent planning and a failure to supervise and carry out the task safely. The risks involved in such lifting operations should not be underestimated.

"Health and safety law places stringent requirements on employers in these circumstances, for very good reason. This incident was entirely preventable and it should act as a reminder to others that standards need to be maintained to ensure the safety of workers at all times."

J H Carruthers Ltd pleaded guilty to breaching section 2(1) of the Health and Safety at Work etc Act 1974. The firm was fined £180,000 and ordered to pay costs of £74,000.