Hi,you cannot condemn any installation,purely on the an estimated age of the fitted equipment.
This HAS to be backed up,with further inspection,testing,and a specific explanation of why it is either not fit for use,or does not comply to any relevant rule or statute.
Just because something is old,does not mean it is not fit for purpose,or Vince Cables wife,would have had a new husband fitted.
The fact that the landlord has not chosen to have an electrical inspection,does certainly not,mean the property is dangerous. It does however indicate his lack of care and foresight,in opening up his risk of litigation,should it be so.
My parents property was built in 1963,and has had no rewire,a few additions,with one new DB,10 years ago. It is in fine order,and complies with all testing criteria and regulations,barring an iron DB,which it is not missing,as all connections were done correctly
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