The Old Bailey heard Przestrzelski was employed as a labourer by demolition sub-contactor Bayoak Demo on a site managed by John F Hunt Demolition, the main contractor.
Originally there were 13 props, but as each one was removed the load increased on the remainder until the final one was carrying the entire load. When the props were removed, the concrete slab fell to the ground and an overloaded prop struck Przestrzelski, causing fatal internal injuries.
The investigation discovered a section of a partially demolished link-bridge structure collapsed when the props supporting it were removed by Przestrzelski. They found a collapse was inevitable as the structure was not physically tied onto the building as was assumed by the management.
Bayoak Demo, also pleaded guilty to breaching Section 2 of the Health and Safety Act on February 1 and fined £30,000 and ordered to pay £8,000 in costs.
After the sentencing, HSE Inspector Giles Meredith said: “This was a lengthy joint investigation between the Metropolitan Police and HSE, which found Rafal Przestrzelski was the innocent victim of a basic error of judgement by others that cost him his life. “There are lessons to be learned both about the importance of carrying out detailed surveys and also about making sure that the right people are consulted at the right time. The price of making an ill-informed decision about the structure was enormous."