Pilot flame

If your tight fisted yes...but its no worth turning it off for the hassle of ignighting every time you want hot water.

-- Sir Benjamin Middlethwaite

It depends on the flame . ISTR a figure of £5 per quarter being quoted - probably £7 now.

That's quite an unusual boiler, then? By the time combis became popular, most had electronic ignition.

I wouldn't bother. It would save fuel, but not a huge amount. It might also wear out the ignitor if you did it every time you needed heat/hot water.

Christian.

Earlier Pott. Pumas. Some C&M models which were bizarre as they have electronic ignition of the permanent pilot! Vokera RS 80. Vaillant VCW 221 Vaillant Sine models. I'm pretty sure I've seen some Ravenheat models with permanent pilots.

The OP would be better putting their efforts into adding/upgrading the controls to a programmable thermostat and TRVs on most radiators. Running the boiler until it becomes beyond economic repair and only then replacing it.