Gas hob "mains supply"

In message , Man at B&Q writes

Ours works fine with the power off, it's just for the spark

Built into the hob - I've never taken apart a hob new enough to have a FFD. But pretty sure they're self-powered and don't require mains.

My brother has a huge 5-burner cooker, where two of the burners are very large. They have thermocouples poking through, like you see on pilot lights. You have to press the knobs in for a few seconds before the burners will stay on, again just like lighting a permanent pilot flame in a boiler. This also triggers the electric ignition, but it all works without electricity if you light the burners with a match. This cooker is probably 10+ years old now.

It was just a general query as someone I know wasn't sure their hob would keep going in a power cut.

I was guessing it may have something that when the ignition button was pressed the mains supply may hold the gas supply on for a few seconds until a thermocouple in the flame or an ionisation detector had a good signal.

Examination of the installation and operating instructions for a few I found online made no mention that the electrical connection was optional if you had access to a match or lighter.

I'm all electric anyway, with a backup camping stove I can connect to my brazing torch propane bottle.