After a new boiler had been installed by BG, my daughter smelt gas in the kitchen. I found that a copper gas pipe had slipped out of an elbow after being left unsoldered. Apparently their leakage tests wouldn't have detected it.
quick backpedal here, I wasn't attacking all DIYers per se Dormouse, only the s* ones. Am fully aware that many 'proffessionals' are complete d*s, I was merely attempting to get people to share some humorous anecdotes [Edited by: admin5]