I am going out for the evening. I will check in over the weekend.
I am very grateful to your replies and help. I will respond to all replies.
At the end of the day, my sister just wants peace of mind that she is legally covered for the electrical safety of the flat (and safety of her brother lol) I'm getting the feeling that unlike the gas, there is no official 'Landlord Electrical Safety' cert and there is a bit of a grey area.
A lot of you are referring to an EICR certificate, which I never got (and paid £100 for an inspection). So this is something I will ask.
I will reply to any other posts over the weekend. Many thanks.
Is that what was supplied & fitted?
No. They did not supply and fit them. They have been in for over 10 years. The electrician initially said these lights had to be replaced with new IP rated lights.
He quoted for the bathroom lights, but then did not go ahead with the job, because they had the wrong lights to replace them (this is another story).
The important point, is the fact that he said that the new fuse box (with it's all-singing circuitry) would supersede the safety of the lights, because the fuse box gives the safety & protection needed.