It’s not always this obvious. These are clearly old fashioned fittings that will not comply with current wiring regulations.
Often problems are hidden in the wall or ceiling, behind modern looking light switches and power points.
The lesson to learn is that unless there is a satisfactory recent circuit test certificate from an NICEIC approved contractor you should employ your own qualified electrician to undertake a circuit test before committing to your purchase. You will then be fully aware of the cost implications of proceeding.