The London Stock Exchange's chief executive Xavier Rolet has urged the European Union to preserve "the principle of national preference", as he welcomed a reprieve for the UK this week over a European Central Bank proposal to force key pieces of market infrastructure into the eurozone.

European courts on Wednesday annulled an ECB proposal to force clearing houses that handle more than €5 billion a day of euro-denominated securities transactions per to be located in the 19-country eurozone bloc.