Britain left the European Union in January and transition arrangements that still allow it unfettered access to the bloc end on Dec. 31.

The High Council for Financial Stability, which is headed by the finance minister and includes the central bank governor, stressed in particular risks related to clearing euro-denominated assets in London, which could only be overcome in the medium term by moving such operations to the EU.

(Reporting by Leigh Thomas; Editing by Hugh Lawson)