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The Importance of Working With a Gas Engineer When working using gas, it's best to work with an accredited professional. This way, you'll be certain that your property is secure and that you're following the legal guidelines. Call national grid at 0800 111 9999 in the case of an emergency. They will stop your gas meter and tell that you contact an engineer. Gas Safety Certificates Gas safety certificates (also known as CP12 Certificates) are legal doc
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