Thanks Abhilash, that "nearly"works :-
So i guess for it to work as i want, i'd have to save/export the above data to a new .xls file, and then use something like:-
if not onfirstrecord and
{data_field} = previous({data_field})
then {data_field}
else "unknown"
or anything else you could suggest ?
Thanks John
so data would look like this :-