I see they are now slowly realising that if they make the solar panels higher, they can grow a limited range of crops underneath. That costs a bit more in metal so greed outweighs other considerations unless the Govt bungs even more money at them, and, requires it to be done.
I do not understand how the ex-Housing Minister, being a (relatively) northern lass, does not understand the impact of building houses on agricultural land.
The ex-Housing minister was a typical urban policitian, and IMO it's an urban vs country thing not a north-south thing. She also came over as a typical labourite who doesn't care where food comes from so long as it's cheap, and who regarded country folk as rich toffs to be squeezed and looked down on. No evidence whatsoever that any of the current government have any more idea of what goes into food production (and distribution) than they have of what goes into keeping the lights on........



I do know a few reasons against railway lines but the roofs I think it is just about the cost vs return if you're not in the electrical generation business.
The main railway one is because of access and the risk of line blockage due to panel damage, be that vandalism, cable theft or natural weather.
Along most railway lines are the nation's broadband and communications infastructure cabling backbone. Any disturbance or damage of those is a very expensive big deal. Generally they do not require any maintenance or access.
Access along any railway is always a big deal and takes a lot of careful planning, even for accidents and suicides (my mate was a signalman, who used to have to literally walk any train thru any incident). There is also a lot of staff training and certs etc. Adding extra solar panel access etc is a step too far and too crowded.
Re roofs, the capital outlay is usually beyond most, and getting a decent grid sale price poor. The good prices have now all gone. A lot of the industrial units are leaseheld, and the landlords have no interest in further investment for a poor return, but will take all or part of any income earnt by a tenant installing it. Somebody I know well is in the generator business and also owns several business parks. If it was worthwhile he would have done it. This also sadly applies to tenanted social/council housing - I looked into it where I lived and the council would own the electricity contract and pay back only a pittance to the tenant.
Plenty of telecoms types have qualifications for access on or near the [railway] line. What's lacking is the access time, hence the need to do any serious work in the wee small hours of the white period or in a possession planned 2 years out...... and of course the under-resourced off-track teams cannot cope with de-veging so the lineside resembles a jungle in many areas.........
Its also a concentration thing. You want to be able to put a bunch of solar in a place together where you get short feed cables to the invertor.
TBH, large scale solar is just a greenwash in the UK. Would be better to focus on getting small nuc and tidal working, with combined cycle gas turbines in the interim. All "net zero" is doing is making us poorer and less resiliant, industry going abroad to be made with greater emissions then we import the stuff back here. The value of a large spinning mass on grid stability is significant, so small nucs and gas stabilise the grid in a way that is not possible with more wind/solar unless there is big investment in grid stability.... grid-forming invertors, large spinning masses to emulate the natural inertia of a turbine generator......
..... food is another matter. Farming relies not only on fertilizers but also on temperature/humidity controled storage and transport.
Real story.
In the immediate aftermath of COVID when day-job work was scarce, I did some business development around using drones for smart farming. Invested in serious commercial kit, got all the certifications and insurances in place, found a place I could fly crops to test ideas, had some cutting edge sensors and software/computing available. Spent 18 months getting to proven concept stage. I was working with an IT partner who was looking at combining the multi-spectral data with existing soil test data too. We got to the point where one person could fly 50Ha in 35 minutes and generate a multispectral image with 100% coverage at a resolution of 2cm/pixel, processing it in 10 minutes. Around 200Ha/day with same-day results was a reasonable target for scale-up, with a further development trajectory beyond that.
That spectral imaging would have enabled early spotting of crop stress. The exact coordinates could then have been used to check the problem, and if a pest or disease starting, use a second specialist drone to treat a very small area. So could use a few litres to spot treat (usually the whole lot is treated, tractor load at a time). That second stage needed work on kit, certifications and systemising- but was very achivable with some funding. The ideas was to monitor regularly and spot-treat emerging problems- thus removing the need to blanket-treat crops with excess fertilizer, pesticide or herbicide. Good for environment, reduce costs but keep yields up. What's not to like?
We couldn't get any grants/support for scale up (not for want of trying) from the stage we were at, even though money was being chucked at other ideas that didn't reflect reality. The farm estate who had allowed us to use their fields to develop the system acknowledged the achievement, but wasn't going to fund further development as they didn't really need the system, as they harvest then store in a temperature-controlled barn until the price is right to sell. They can wait out low prices, and bad years cause shortage which increases the price.
In the end, I had to make a call on whether I continued. As a very small business, I couldn't sustain further investment (time, money) on my own, and my other work was picking up again. So I put the drone in the shed, and walked away from the whole thing. (I'll get around sto selling the drone and sensors one of these days). Hard lessons, but that's the nature of trying to earn a living as a small business.
Unfortunately, I think it will take a "serious situation" (grid rolling blackouts, food shortages) before anything changes. Which is why I'm a big fan of improving one's personal domestic resilience to cope with more difficult times ahead.
GC



