http://www.hse.gov.uk/pubns/indg236.pdf
http://www.hse.gov.uk/pubns/indg237.pdf[/QUOTE]
So, no tests, only visual, needed for Class II items in those environments (please note: same as the IEE guidance!).
What about all the Class I appliances you'll come across? What tests (as it says: combined inspection & testing) will you do on those? An earth bond continuity test with your multimeter? Unless it's a low resistance ohmmeter, it won't be up to the job!
A leakage test with your clamp meter? Again, not good enough if an insulation test should be performed.