It is illegal to carry out plumbing and gasfitting or work without authorisation.
When engaging or hiring a plumber or gasfitter ask onsite to see their authorization card. All qualified tradesman are required to carry this card on them. Using an unqualified tradesman could result in the following:
1. Works being done that puts your families health and safety at risk
2. Your insurance company not covering any claim for damage caused by faulty workmanship
3. Also check to see if your tradesmen have been mentioned on no cowboys. As always, do your homework and be safe.