Solicitors have to keep everything for at least six years, and usually longer as well.(posted 7774 days ago)It's well worth sending seperate assessment requests to the IC, one for Abbey & one for the solicitor. My pal served SARN's on everybody when he was in dispute with Abbey, and these produced results sometimes, but don't hold your breath.
Above all, don't let them get you down.
Good Luck, Harry