Our house is similar age and this would be to replace just two radiators.

This was from one of the local facebook groups. Cheapest of cheap boiler (£650 from a plumbers merchant) and no idea how good the company is but it is possible to get an install for £1.5k. You're probably right a decent Worcester Bosch would be twice that or more.

Yeah I expect it to be more than a new boiler because you're having a lot more work done than that, but a new boiler around here is generally advertised at around £1.5k for a cheap brand, so getting on for 10x the cost. I think you're right its probably set to what consumers can afford after grant.

Already have a water tank and all the piping to it. HP would sit next to where boiler is currently, and next to the consumer unit for power. A couple of rad replacements but these are charged at £50-200 each so don't add much to the cost.

There's no lifting of floorboards to replace pipes etc.

It's hard not to conclude that the government grant is actually pushing prices up, not reducing them. I'm not sure how anyone can be expected to go electric when this is the cost currently. They're also only quoting a COP of 3.0-3.4 meaning even with smart tariffs we'll struggle to beat gas pricing.

A heat pump suitable for our house is available for £3.6k from a plumber's merchant. I'm struggling to understand where the £8-11k in radiator replacement, pipes, and labour comes from.

This is not a complex install: the HP will go next to where the boiler already is.

I used it again recently and as much as I love the route, the surface is horrendous even on a hybrid style bike with plush tyres, it must be borderline unusable on a road bike.

I wonder how many people are rarely/never a pedestrian on the public highway though. Park a car on the drive, then only get out of it at work carpark, supermarkets, etc.

Whereas 10l tank of diesel which isn't a dissimilar size (but most diesel heaters will draw from the van tank so no space lost inside) would probably last a week of nights.

The issue is even with modern battery tech you're still looking at low runtimes, and extreme bulk and weight vs a tank of diesel or canister of propane.

They're getting better but this battery that I have would run a desk heater (600W) for under 5h. A proper 2kW fan heater for 1h.

I did consider installing a diesel heater myself but so far I haven't needed it. But then I did overdo the insulation, 50mm celotex on the floor and wall cavities, 100mm on the ceiling and 12mm closed cell foam on the rest of the walls, and its such a tiny van it stays reasonably warm with body heat

Good shout. I was being quoted something silly like £800 total for the towbar fitting and a decent bike rack - the folding bike was cheaper on C2W!

Does your n+1 include a folding bike that fits inside? Mine didn't but it does now!

Depending on your electrics, an electric blanket and a decent duvet should be all you need to keep warm even in winter. I have no heating in mine but stay in it in winter for work trips no issue. Although this month it was 17 degrees in London so I was closer to too hot than too cold!

You'll love it, I love mine. Motorway services usually have showers, or you could get a nationwide gym membership. Big supermarkets usually have toilets and some are still 24/7 and let you park overnight (sometimes for a small fee online).

Although maybe I'm missing something obvious in them calling it a "Trixie" crossing. Is there any pun in the Trixie name I'm missing other than "tri" for three types of road user?

If it's not a fun pun based on a bird or winged creature we're not having it.

Looks like the stagger would only be in case slower pedestrians get stuck in the middle (i.e. they don't want the green man to be too long), as the cycle crossing would absolutely need to stop both carriageways at the same time.

If someone wants a £10k bike they actually have to have a salary that allows them to buy a £10k bike - it's not the government buying someone a bike