Boiler update: I moved all the stuffs so that barakta wouldn't have to move them in my absence when I went for a covidstab. The emergency gas man couldn't not attend, so the regular gasman didn't attend instead.
We've determined that the boiler's out of warranty, so I expect he'll turn up at some point tomorrow, look at it, pronounce it "beyond economic repair" and bugger off pending authorisation and copious free time to install a new boiler. Presumably something with a higher power output and a stainless steel heat exchanger, as these have been subjects of his previous tutting.
This irks me from a wastefulness perspective, but I suppose makes sense from a minimising future dealings with the landlord perspective.
Getting a bit fed up with washing in cold water.