Any question answered...

Sounds like a failed Olympian - what does it actually mean?

No idea whatsoever. And it looks like I’ll die not knowing as, frustratingly, I am the internet’s sole JRTFH expert.

^^^It was thank you NHS or similar last time I passed and that covered give Hench a chance which had covered the peas.

Good t shirt material anyway.

Hench needs a good bloody slap for covering peas. The original made me smile every time I drove under that bridge. It was the milestone for ‘not too much further now’ when driving to Hertfordshire from wales.

Is there really any point in sorting my plastic rubbish? It can be recycled just the once, using a fair bit of fuel, presumably to make bin bags. Which then go in an incinerator or a landfill.

Yeah same (Bristol to herts). Although I’m concerned I didn’t even notice it had been gone over - presumably by that point I’m asleep at the wheel.

It is possibly of limited value today but chemical recycling of plastics is on the horizon.
https://www.bpf.co.uk/plastipedia/chemical-recycling-101.aspx

Can I fit a 9 speed cassette on my 10 speed hope hub?

Yes

I think most councils get charged landfill tax on anything that is not recycled, that probably gets passed on to you in council tax. So it is probably worth trying to put as much out for recycling as possible.

Your mission is to heat peas, not water. Minimum quantity is the way to go.

Surely that depends on whether you want to heat them quickly or efficiency.

What’s a brand that makes good quality, shimano 10 speed and QR hubs that are quiet please?

depends on whether you want to heat them quickly or efficiency

Since your energy flow rate is limited by the equipment you have at hand, the fastest method is also the most efficient, and vice versa. The only thing which would alter that would be an efficiency difference between the method used to heat a batch of water and that used to reheat the mixture peas-in-water.
On the other hand, what kind of efficiency? An electric kettle is more thermally efficient than a gas hob, but my utility company is charging nearly 4 times as much for electricity as gas, so gas is more economically efficient.

Shimano.

What’s a brand that makes good quality, shimano 10 speed and QR hubs that are quiet please?

Shimano

Thanks, sorry I forgot to say apart from Shimano, it’s for off road use, would prefer sealed bearings.

I mean more, oh shit, everything else is ready and I forgot the peas, it seems quicker to kettle boil enough water to fill the pea pan then whack said pan full of boiled water on the biggest burner that doesn't blast fire round the sides. Little bit of water and proper timing would be more efficient cost wise.

MQL is still more time-efficient because you can heat peas in a little water on the hob in less time than it takes to boil a kettle full of water.

I believe you because you're usually right about such things, pea heating expert that you are, but I'm still going to test this as it goes against my instincts.

Shimano hubs have good seals, but if you want cartridge bearings then my bitex hubs have seemed decent and aren't particularly noisey, good engagement but a subtle buzz.

There is a bunch of variables not accounted for in my simplified thermodynamic model, so experimentation is welcome. You will have to come up with a more refined model to explain your results if they differ substantially from my prediction.

Shimano hubs have good seals

Up to a point. The back of the free hub rotor is poorly protected. If you keep them away from jet washers and immersion, they are fine.

I often preheat the kettle water too, so it's nearly boiling when I switch it back on at "oh, shit the peas" time. I'm going to weigh peas and start with tap temperature measured water the next few times though.

IMO to keep maximum crunch you want a lot of water, rolling boil, dump the frozen peas in, temp up and cover, as soon as the water wants to boil over they're done. If peas weren't frozen then don't turn up the heat and don't cover. Once done pour out in to collinder and rinse with cold water