It's a load of mince.
Do you know anybody who has died of botulism from a jar of jam???
Seriously.
I don't.....and if jam goes mouldy you just take the mould off and eat the rest of the jam. It's like cheese.....but they don't eat mouldy cheese, or bread, either, do they ?
If it goes mouldy simply remove that mould and the surrounding stuff, and eat the rest. It generally only goes mouldy where there's condensation.
Surprised they manage to eat yoghurt or kefir, or even sauerkraut
Hey? how about all the continental sausages ? you know the ones made with no chemical preservatives except salt.
Basically the entire thing is simply to promote
their canning method....the ones that use expensive jars and expensive use once and throw away lids.....they might be cheap in America but you're lucky if you can find a dozen here for under four quid, and it's usually a lot more.
Basic, decent cleanliness and hygiene, careful cooking and sealing, and there's nothing wrong with British (or European) jam and fruit preserving....except it's cheap and it's done at home by hundreds of thousands of people, and doesn't benefit anyone selling expensive canning supplies.
Toddy....who makes at least 200 jars of jam every year......and has done for longer than she cares to remember. In all that time I've had less than a dozen even go mouldy, let alone make someone ill, let alone kill anyone.