SPD's - Just going by experience, Customer had extractor fans lasting 2/3 days(approx 10 years ago)...quality ones for 2 weeks at best....transient voltage caused by heavy industry nearby, SPD installed.
If I see TVs/delicate electronic equipment burning out every week, I'd fit one as standard. Or one could say the equipment was not fit for purpose. I have used surge protection for years on my PC/laptop via a plug or extension lead. However, it should not be promoted as a must have solution for cheap electrical devices designed not to last.
Amd1 departure - I have used old forms/certs because new ones were not published in time...and have been assessed as non-compliant due to not having SPD or AFDD tick box on my certs. So what is really important here ? Carrying out electrical work in a safe manner to a good standard or ticking boxes I currently rarely use? Thats CPS for you
BS7671 :Thank you
I will look into it, In the meantime there are some real creative reviews on Amazon about BS7671:2018