Mikey: your son in law must have been on the D18E which runs past Sotteville Yard; it is on my route from home to France and I drive it often. There are indeed dozens of locos "stored" there and have been for the past year - mostly diesel freight types 66000s and so on but also some electrics. There have been photos and comment on this in the French rail press, but I can't find any pics on line. The explanation is that French rail freight has collapsed in recent years - even before the recession - that SNCF's awful industrial relations system has made rail freight completely uneconomic and it has withdrawn its wagonload service. These are the locos that are now surplus to requirements. I think they are nominally "garees bon etat" - capable of re-use - but some have been standing for over a year. I imagine most will eventually go for scrap, but that will cost money and it costs nothing just to leave them rotting.