The landlord between tenants: a two-hour audit that prevents deposit disputes
The gap between tenancies is the only time you have an empty unit, full access and no one to inconvenience, which makes it the cheapest possible moment to deal with electrical wear. Faults found now cost a call-out; the same faults found by an unhappy tenant in month two cost a call-out plus an argument about liability, and unresolved snags are a recurring theme in deposit disputes at the rental committees.
A competent electrician can audit a one- or two-bedroom flat in a couple of hours: test every socket with a tester, press-test each RCD, check water heater elements for earth leakage before they become the next tenant's mystery trip, tighten DB terminals that loosen with thermal cycling, replace yellowed or cracked switch plates, and label the DB so the next occupant is not flipping breakers at random. In villas, add the garden circuits and the external water heater cupboards, which bake in the sun.