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CORGI - 58% of Consumers Still See It As An Essential Factor When Choosing Their Gas Engineer When repairing or replacing your gas boiler, you need to ensure that the person you choose to hire is qualified. Recent polling conducted ahead of Gas Safety Week showed that even though CORGI not being the official register for gas engineers, 58% of consumers still consider it an important aspect when selecting their engineer. Qualifications Becoming a gas engineer is an extremely lucrative career choice