But to be frank I think the electrician did the right thing, when he knows before starting he will need to fail the installation to take money for fitting a new consumer unit and an EICR is morally wrong, he has told the client what needs doing, so it may not be what he should do, he should if he thinks the installation is dangerous disconnect the supply to anything dangerous, and if that means the home is considered uninhabitable then he should find alternative accommodation, however he does not need to foot the bill, so a little pointless.
Some of the rules seem daft, the lights don't work so uninhabitable so live in a tent which has no lights anyway?
The owner should have known since 1976 that the lights did not have an earth, we should get a PIR/EICR every 10 years, so rules changed in 1966 so owner should know by 1976, OK I know we don't get our home tested every 10 years, but 35 years I would say is long enough, if you don't get home buyers report, or don't do a check for mining in the area and some thing goes wrong, well you took the risk, not anyone else.
Even when I did not need a mortgage, and so did not need any home buyers report I still got it done, and have also insured my house, I had mothers house rewired, no one forced me, but one I wanted a safe home for mother, and two ability to rent the home if mother went into a nursing home.
The electrician has given
@firapara breathing space, where they can consider the way forward, FOC one assumes, and good on him for doing that, there are things like all class II fittings which can improve the situation, but that is a stop gap, rewiring is required, so now you can plan when it is done and that means you could arrange alternative accommodation, with my mothers house she had to go to hospital, and I took that opportunity to get her house rewired, it was tight, but I managed to have it all done for her return. Cheaper to rewire a house when no one living in it. No need to ensure everything is safe at all times.
Had it only been a CU change then OK maybe he should have changed it anyway, but he was also going to do an EICR and so he was right to say pointless doing half a job and leaving you with a fail on the report.