ROME (Reuters) – The European Union wants Britain to end uncertainties over the terms of its exit from the bloc, the EU’s chief Brexit negotiator Michel Barnier said on Thursday.

Barnier told the Italian parliament he was looking forward in a “constructive spirit” to a speech by British Prime Minister Theresa May in Florence on Friday, when she is expected to flesh out her vision of Britain’s future relationship with the EU.

“We expect clear commitments from Britain,” said Barnier, adding that an agreement between the two sides needed to be found by November next year in order to allow time for it to be ratified by parliaments.