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The Importance of a Gas Registered Engineer In the UK, engineers and plumbers must be Gas Safe registered in order to work with gas. This is important, because carbon monoxide poisoning and faulty central heating systems or boilers kill thousands of people every year. To be Gas Safe registered, engineers must prove their qualifications and competence. To prove this, engineers must pass assessments. Once successful, they will be given probationary registration status. You can also learn more about the requirements fo