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The Importance of Working With a Gas Engineer When working with gas, it's always best to work with a registered professional. This way, you can ensure that your home is secure and that you're in compliance with the law. Call National Grid at 0800 111 9999 in the case of a suspected emergency. They will stop your gas meter and inform you to contact an engineer. Gas Safety Certificates Gas safety certificates (also known as CP12 Certificates) are legal documents that verif
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