91111 and 91131 are on the list of things earmarked for entering the national collection, 111 in it's livery at present, and 131 as it was the last loco built by BREL and is the record holder for fastest electric loco to run a passenger service. At present I don't think 91110 has any certain place in preservation, however considering it is the fastest electric loco the country has ever had and is currently in a unique livery, I would imagine it will end up with a preservation group, somebody like the AC Loco Group?
Jack