Given the touchy feely nature of the current government, probably. I still think that we shouldnt do it unilaterally...I know the Swedes have a policy of Finders Keepers on their museums...so do we impoverish ours alone? The french are unlikely to return the Venus de Milo...the Mona Lisa should be italian, surely? both the painter and the client were, as I recall. Will they give that back? No.
What about the bust of Nephertiti which the Germans have? Its not just us, its everyone, and untill we ALL agree to do a handover I dont think anything should go anywhere.