I'll doubt it will be going anywhere for the short term, the loco is currently plinthed at the Warner Brothers studio tour in Leavesden near Watford. Afaik the engine is still owned by WCR and they have been reluctant to sell. I don't doubt the locomotive will probably move on to pastures new eventually, as time goes on Harry Potter will become less relevant to the next generation and so forth and the loco will probably become surplus to requirements.