Mr Corbyn told LBC News: “If we preach international law and international legal process through the International Court of Justice in The Hague, then we should carry it out.

“If it’s possible to arrest somebody and put them on trial, then that is what should have been done, and that is what I said about the death in 2011 and it will continue to be my principle.

“If we believe, as we do, in international law and justice, and the power of the International Court of Justice, then we should do everything we can to bring people where they deserve to go on trial to be put on trial, as was Milošević.”