An Surge protection device basically cushions transiant over voltage. Which can travel back from lightening strikes, solar ev chargers. Then suppresses that high over voltage and then throws it back to ground again. SPD's can prevent sensitive equipment from getting damaged. That said it's pretty much mandatory to have them installed now. Split load consumer units are pretty much obsolete now too. Each of the 2 rcd's shouldn't be in excess of 9 mA of earth leakage. With Rcbo's you can have upto 9 mA on each circuit. I haven't fit a split load board for a long time. I'll only fit full spec rcbo consumer units.

Metal case with A Lot of exposed contact points - a tragedy waiting to happen, truly “well finished”. You should be able to slide your hands with your eyes closed, not touching high voltage exposed metal

I can tell you now, if I had to do that everyday of week, there's no chance I would be doing that crap, I wouldn't care what money was on offer, you would be knackered at the end of every week.

They’re quick because they specialise in rewires and they probably have at least 5 guys on site every day

@@samuel2j213 and the rest

There's a reason why a Bentley takes longer to make than a fiesta

Sorry to hear that, preparation is key!

Really? - name the BS7671 ref stating they are mandated

If you wish to pay £150 each

@@AndyK.1 gunna be mandatory for new installations from next year .

@@farooqshah2797 in the UK ? seriously doubt it maybe 10 years away

​@@farooqshah2797It's only mandatory in houses of multiple occupancy, care homes and student accommodation. For circuits upto 32A. As to how effective they are, is questionable.