The key thing to remember is not all engineers are qualified to do all types of gas work. So, to check if an individual engineer is currently Gas Safe registered you will need to know their unique 7-digit licence number. You will find this on the engineer’s Gas Safe ID card. All gas safe registered engineers are issued with a new ID card annually and each new card will have a different licence number, so always check an engineer’s ID card before any work is carried out.
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