Onoff

One stop shop. Read their excellent guides and unless your sat on a TV transmitter get a band specific aerial rather than wideband. Identify your TV transmitter and go from there. Usually easily enough to figure out, look where the neighbours aerials are pointing towards. Log periodic aerials are nice and compact IF suitable. https://www.aerialsandtv.com/knowledge/planning-your-install I'm in an extreme fringe area so have the biggest Band A Yagi they do.

He's underneath looking up! 😉

To be completely honest, with hindsight I wish I'd done something like that for my kids in the garden and sod the pp. I got as far as this. They had loads of fun in it. TBF there was a dead tree there originally with a wooden platform. Things just...mushroomed.

Not many tree houses you see with Celotex in the walls. Nice too that it's big enough to hold family gatherings in...

Hmmm...🤔 As lovely as it is did they get planning permission? Surrey...guessing they've a few quid. Surely it's too high? Sleeping and eating in there? Pics of the girl in her dressing gown and sipping a cuppa??? https://www.borntoengineer.com/mushroom-shed-of-the-year-2017

Yes, that's how most were done.

Just put a trace heating tape on the pipe. Used to see loads of them on the taps on high rise roofs. Something like this: https://www.tlc-direct.co.uk/Products/BNPW01.html

Call that crud?

Pack on top and under the washer with say Sikaflex, BT1 etc. Push the trap down into it until it squidges out but DO NOT let it turn as you tighten the black nut. Wipe the excess off with the cheapest, unscented baby wipes and leave to set.

When using these... https://rockbottomnorthampton.co.uk/products/draper-tungsten-carbide-grit-hole-saw-20mm-34866? I first smear a dab of copper or aluminium anti seize on the thread of the drill arbour. I constantly spray water on the drill. Periodically I hold the core drill with a bfo pair of moles or an adjustable spanner across the flats of the slots and reverse the drill to remove. Then knock the accumulated, compacted crud out with a bit of stud or rod. Go again, repeat.

All the required clearances are here. Manufacturer's instructions also need to be taken into account in case greater: https://assets.publishing.service.gov.uk/media/6336e58be90e0772dc9651a2/ADJ_2022.pdf

Don't sweat it. They have top and bottom entries anyway.

School mums... 😉

Buy a 3D printer and print a spanner!

Some decent rain will swell my swedes.

Standard 1/2" BSP, parallel threads.

20 "snacks" in each packet?

With the full EV I only go into a petrol station now to buy unhealthy snacks...

I'd use Forever White or BT1. Both have fungicide in them.

In 10 years, all good: I did have to back it off at installation and smear with Jet Blue Plus because of a drip:

Soda blasting too: https://premiumdoorstripping.co.uk/what-is-soda-blasting/

How about CO2 paint stripping? For example: https://iceblasters.co.uk/

What will look odd is if a groove is off centre to a single gang switch/socket.

Mice can get through a hole the diameter of a pencil. Any holes you find, stuff with cheap stainless steel dish scourers. For example: https://www.savers.co.uk/household/all-household/cleaning-products/cleaning-sponges-dish-cloths/super-bright-stainless-steel-scourers-6-pack/p/574155