Hello Andy and thank you for responding. It is the latter I am after. So far I have identified a few determinations that don't make any sense at all eg. Ground ivy being changed to Weasel? I suspect that this error is related to species that were originally recorded on another version of Recorder or was an associated species on another version of recorder and has somehow managed to become the preferred determination on an unrelated record. A report that lists species records with multiple determinations that would allow me to see the original determination and recorder and the later determination and determiner would give me something to start with. I am having difficulty trying to figure out how this happened, so need to determine the size of the problem in the first instance. It is older, historical records that this has happened to but the preferred determination is by more recent recorders so the dates don't make sense.
I am sorry I am a bit rambling, my first day back this week and I am trying to get my head round this.
Many thanks for your help
Mhairi

That would be brilliant Andy, thank you very much. I shall park this just now till I hear from you.
Thanks again,
Mhairi