dpmiller

might the strainer in the PRV be blocked?

monitor the flow temp to the tank during the DHW heatups. You'll likely find the ASHP is maxed out, and the top third of your tank will end up at those temps...

bog-standard scoop tilt downlight, with your choice of lamp?

presuming it's actually the correct cable?

yep, landscape trays here too, from PluginSolar some years back

no RCDs in that box... Suggest calling a spark in soonest.

there are special screws for joist hangers https://www.strongtie.co.uk/en-UK/product-lines/nails-and-screws/connector-screws

we went hemihydrate and anything that happened to land on it seemed to stick like sh*t to a blanket. We *have* primed it which makes them stick even better now...

flexible pearl-catcher grabber thingy?

POM is the type of plasic the part is made from, is it not?

not with the tile, but happy t confirm they're a well-respected manufaturer

and if you're going EPS, make it the graphite stuff, substantially better for minimal extra cost.

yep normal enough. If you've room to fit an EGO one in, they last a bit better in my experience?

does it need to be outside? could it be hid above a soffit?

You could probably do what's done with 3hp x2 tandem compressors, just put a short delay on one of the motors. It only takes a second for the first motor to come up to speed and reduce it's consumption to sane levels, then there's plenty of juice to kick the other one in. I doubt a second would put the screws too far out of balance...