Somewhere on my phone I have pic of YEB panel, fitted at skirting board height in former filling station....
selling nuclear fallout shelter for the soon to kick off ww3 ?
lets have look at the information on your link dated Dec 2020 -
If you run an Alarm Receiving Centre the rozzers have mostly automated their control rooms (ECHO) & to be on their platform you'll need a "Cyber Essentials Cert" which is nothing to do with NSI (or SSAIB)
If you don't have your own ARC but use an accredited 3rd party like almost all of the modest sized alarm co's there's no need to bother with "Cyber Essentials" as it not essential to have
PS all business & personal passwords are B@nanaman1983 & I've never been hacked....
sounds like a refrigerator problem...
You probably have a hellhound called Zuul who is the Gatekeeper of Gozer living in some sort of parallel dimension within the fridge ?
For work in London you don't really need to provide much more information than say "Battersea" to see if a local provider is willing to offer a price for the job.
Its unlikely we have an active poster that supports the location & your preferred manufacturer but a member may be able to provide a recommendation to co. which will look after you.
I'm form he North of England & do some commercial work in London, after travel & expenses I think I earn the same money as working at home....
I only do it for the turn over & the look of horror when I say please & thank you to bus drivers & good morning sir to traffic wardens..... ect