Would you help me to answer this question (Based on English Law)?

Alex is an employee at Peterson Ltd, a factory. Peterson Ltd has ignored health and safety regulations and has not maintained the lock on a security gate.

Alex leans against this gate which opens causing him to fall into a furnace. Alex suffers serious burns to his body. Identify which actions Peterson Ltd might face from Alex and the State.

Your answer should also include details of the relevant courts, judicial personnel, the relevant burden of proof and the possible legal outcomes and why, on the same evidence, it is easier to succeed in a civil case than a criminal prosecution. How would your answer differ if Alex had died?