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Stalin meant military divisions. And what qusestion are you referring to?

Alternators I used to work on years ago, the rectifier had soldered connections, but the regulator had screwed terminals. If yours is like that changing the regulator isn't a soldering job. I suppose these days it might have a combined rectifier/regulator, you can tell if you dismantle it.

As the Pope has no divisions (not counting his Swiss Guard ;)) that's a bit of a no-brainer.

To quote Josef Stalin - "How many divisions has the Pope?"

Is there a cold water storage tank (CWST)? Most likely in the loft. Is the system fully pumped on the primary side, or gravity to the HW cylinder? Are there any motorised valves? The pump would be on the secondary side. Whether the rest is pumped depends on where the pump is. A sketch of the...

But we can guess!

If it's just the tube, can't you just replace it?

Are you sure the alternator has a built-in regulator? In many modern cars the voltage is controlled by the engine management computer (by varying the field current, same as with built-in)

One of my pet hates

On the subject of corrections, this is what I think you meant ;)

There is, it's in the 2nd photo with your original post, it has a yellow electric shock label.

Iranians aren't Arabs, they're likely to get annoyed at any suggestion they are.

Or walk or bike there, turn round and come back, and save the membership fee

Sauerkraut only needs readily available ingredients. I fancied trying kimchi but specialist shop ingredients needed. Never tried kombucha or kefir.

Easy enough to make your own

He didn't give the combi output, but they're usually around 30kW, enough to give reasonable HW flow, or what's the point? Unlikely that's the reason for the low flow. Same here!

Why a surprise? The flow depends on the mains pressure and the height of the CWST. Sounds like the CWST is on the low side and can't be raised, so more often than not mains would be better. But it should have checked to make sure the change is worthwhile.

What made you change to a combi? There are pros and cons with a combi (mainly cons IMO), one problem being changing a gravity system to pressurised, as you've found. The installer should have pointed that out.

That's right, the solution is to throttle the hall rad more, so the roomstat there is less likely to be satisfied. The problem I see is when the outdoor weather is about 12° the roomstat will always be satisfied, so unless you turn it up you can't heat other rooms. Putting the roomstat somewhere...

Starmer talks as if we only need to increase defence spending because of pressure from the likes of Trump, and he's showing principled resistance by dragging his heels, saying 3% by 2035 or something.