Britain wants "legally binding" assurances from EU leaders it will not be trapped indefinitely in their customs union by the Irish "backstop" clause in the Brexit divorce, a minister said Tuesday.
Martin Callanan, junior minister in the Department for Exiting the European Union, was speaking on arrival in Brussels for talks as Prime Minister Theresa May tours EU capitals in a bid to save her deal.
On Monday, May postponed a bid to get the Brexit deal she negotiated with EU leaders last month past parliament, and now she wants new reassurances over the emergency backstop clause.
EU leaders have warned repeatedly that the deal can not be "renegotiated" but EU president Jean-Claude Juncker - who May was to meet later Tuesday - has said there could be "further clarification and further interpretations".
But this may not be enough for London. Callanan, arriving at the European Council for foreign policy talks with fellow ministers, said May was seeking a binding promise that the backstop is not indefinite.
"Each side has their interests that they have to protect, and the Prime Minister is negotiating hard for the best interests of the UK," he told reporters.
"Well, she wants additional legal reassurances that UK cannot be permanently trapped in the Irish backstop. That's been the issue all along and that is the issue that is the heart of the concerns expressed by many members of the parliament.