Ring final fault.

[davesparks]

Ok Dave I get what you're saying it's just I was expecting 0.39-0.48 etc and got this, no other ranges just IR so bit of a nightmare that the tester can't do its job properly I guess

That tester does have other ranges, you really do need to learn to use it properly. It has various megohm ranges used in its IR testing function.
It is not the tester that can't do its job properly, it was designed for carrying out testing of new installations and periodic inspections and it does this perfectly well. It was not designed for fault finding work!
An analogue IR and continuity tester is the best thing for general fault finding in my opinion (and most electricians I know) with a multimeter also being useful on occasion.