My understanding is that these 'AP's are nearly as bad as defaults. I wrote to experian who confirmed that these markers don't exist on my file whilst they have been placed on my equifax file. My 'credit score' works out at 928 (experian) 467 (equifax) - go figure!
I also never entered into a written or verbal 'arrangement to pay' with IF. Will be filing with MCOL next week.