"Annoyingly, since PAT testing is simply a confirmation that the Earth connection works, anone with a multitester and a screwdriver could do it for themself."

Testing the condition of the earth connections is only one of the tests,also covered are, polarity, type and size of plug top fuses, type and condition of plugtops and conectors, size and condition cables and appliances. Oh and multytesters won't do the all the tests required.