The EU will be making a major mistake if it tries to "punish" the UK for Brexit, London mayor Sadiq Khan will warn in a keynote address in Brussels.
His comments come a day before Prime Minister Theresa May is set to invoke Article 50 and formally trigger Brexit, and are intended to put the "emotional" argument for a fair deal between the EU and the UK.
"Now is the time to be confident in the European Union and to act with confidence. There is no need - as some have suggested - for the EU to send a message, or to instil fear, by punishing the UK," he will say.
He will also call on Prime Minister Theresa May to make a gesture of goodwill when she invokes Article 50 by guaranteeing the rights of 3.3 million EU citizens in the UK.