Thanks to you all.
I think AIB's checklist is misleading then. They have a section listed with the requirements for a loan (top-up or otherwise) and it lists 3 things, MPP, Statement of Marital Status and PPP. But when you read further they seem to contradict themselves by closing the section on PPP with a "...we recommend you take out PPP..." (I'm paraphrasing here).
Looks like they just want to get more dosh from the punter. Normal business protocol I guess.
Anyhow, thanks again.
Noob.