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The Importance of a Gas Registered Engineer Gas Safe registration is required in the UK for engineers and plumbers who work with gas. This is crucial because carbon monoxide poisoning, faulty central heating systems and boiler installations kill a lot of people each year. Engineers must demonstrate their competence and qualifications in order to be Gas Safe registered. To do this engineers must take tests. After they have passed the assessment, they will receive the status of probationary registration. Qualification Before an engineer can work with