Ian, I think this will be my last ever visit to an electricians forum.Did you advise LABC before you started the work? If not then you have broken the building regs. Please do not start 'having a go' at everyone that has tried to help you. You asked a question hoping that people would support your actions and that does not seem to be the case and are now getting upset with us all for advising you that it was wrong to do what you did.
Were your many years of working in the industry mainly in commercial?
thank you all for " advising you that it was wrong to do what you did "
Work safely - trust your own knowledge in individual circumstances. Take the dollars $$$$$$$$$$$$$$