I'm also looking to install standing seam solar on a new build roof. I can share some of the quotes I have received. As @Nickfromwales pointed out the catnic system is bipvco, i have struggled to get a quote from a catnic installer to do the work, as they aren't very experienced at these type of installs. My understanding is that they send the panels to bipvco for them to stick them on the panels!
I did manage to get a quote from bipvco for their solar film/panels which was coming in at £11,500 for 7kw, supply only.
I have also been in contact with https://vertix.systems/# they make their own standing seam system (fabricated from catnic steal) and also use bipvco which you have to source yourself, their system is supply only and their pricing seems reasonable. They are just in the process of releasing there own solar inserts that are stuck on during manufacture but are glass pv( they are not MCS compliant), its not on their website but you need to contact them directly, specs are below :
At that price 7kw will cost £6600.
You would also need to purchase their roofing system, materials including guttering and down pipes for a roof 230m2 is coming in at £14k.
My only problem is finding someone to install the roof, their recommended supplier has come in with a quote of £19k labour only installation!
The other option is Roofit, there are a few suppliers in the UK, supply and install is coming in at around £50k for 7kw.
If anyone can recommend reasonably priced installer in South Wales I would be very grateful.