Irony, or Life's a Gas

'Once I had love, and it was a gas', I shall be singing tonight, a cover of Blondie's Heart of Glass (with the words!).
The boiler has been eavesdropping and what-ho, it started leaking-alonga-music and I have had to call out the emergency gas engineers who have turned off the gas at the meter.
No cooking or hot water till (I hope) tomorrow.
Did the chap who came to service it three weeks ago leave me with a leak?
If so, he shall be expecting a bill from me to cover the costs of fixing it!