@Delphi @ceilidhman JFC.
Also, send a picture of the socket to the local council's HSE now; don't wait. It's not just you at risk.
I moved into a house in East london once and the landlord's agent said it was problematic but that it would be fixed up inside a couple of years. We had to go back and point out that the guy who turned the electricity on said he wouldn't live there and that every socket and light switch had scoring.
Rewired the place in six months.