Many thanks. In the interim I've managed to get the accounts type from the filing history 'items' array
I've also noticed that where the accounts type is "unaudited-abridged" it also is returning "undefined". (Co No# 05190146) Yet oddly this type also doesn't appear in the enumerations as an option so not sure what is meant to be returned for that.
Don't know if that adds helpful info but thought I'd let you know.