London, Apr 7 (IANS): The President of the European Council said he had agreed to maintain regular contact with the British Prime Minister throughout future negotiations on the Britain's withdrawal from the EU.

In the first meeting between Donald Tusk and Theresa May since she notified the EU of Britain's desire to leave the bloc, the pair talked for about two hours at May's official residence, Efe news reported.

"Meeting PM May to make sure Brexit talks get off to good start," Tusk tweeted. "Agreed to stay in regular contact throughout process."

He refused to comment further as he was leaving the residence and said "no" to a series of questions, including whether the duo had discussed the Gibraltar issue.

Asked whether the talks had been constructive, he said "as always".

On March 29, Britain officially notified the EU of its wish to pull out of the EU, and thus triggered a two-year period of Brexit negotiations.

Brussels has said it would only begin talks on future trade agreements with Britain once "sufficient progress" had been made in the negotiations.