Thanks both of you for the quick reply.
Ian - I can't see a safety cert. in my paperwork, so I'll take this up with the real estate when I call about the boiler, thanks for the heads up.
Is there any particular problem that could present as a faulty ignition followed by a burning smell...
I have recently moved into a rental home which has a (very old) glow worm space saver 38 installed in a cupboard in the kitchen, which feeds to a tank in the living area.
The pilot light went out recently, and wouldn't re-light (no ignition or anything), and the real estate sent a plumber...