when carrying out a PIR before an address is rented out, there are always the issues of original wiring being sub standard for current regs. examples being earthing, special locations, RCD's smoke detectors to state just a few.i always make a point of upgrading the earthing, and do my best to suggest RCD's for showers, but what if anything do other people practically insist on apart from the standard PIR inspection tests.i would appreciate others views