I am shocked electrical work is not regulated - I thought that had changed with part P.
part p is a ******. only covers domestic in england & wales. england & wales also have different requirements. only certain work is notifiable. ask 3 different LABC questions and you'll get 3 different answers. EICRs are not covered by it. and if you follow 'approved document P' then you should be installing to an earlier version of BS7671 since they specifically state which edition and they've not kept up with changes in standards since then. it was also part P that introduced many barely qualified and incompetent 'electricians'