World Bulletin / News Desk

British Prime Minister David Cameron is not expected to trigger the Article 50 mechanism to leave the EU when he meets his European Union peers on Tuesday, a senior bloc official said.

"We expect Cameron to present the outcome of the referendum and the situation in the UK ... we do not expect Cameron to trigger Article 50 at that stage," the official told a briefing Sunday on next weeks summit.

Cameron resigned Friday after losing the referendum he had called on Britain's EU membership, saying he would leave it to his successor to invoke Article 50 and so begin the negotiations on leaving the bloc, most likely in October.

The top EU leadership, including summit host Donald Tusk who heads the European Council, has pressed Britain to begin the talks as soon as possible so as to avoid further damage to the bloc where eurosceptic sentiment has grown sharply.

The senior EU official, speaking after a meeting of the other 27 member state envoys to the bloc, said everyone "understands that there is quite a crisis in the UK right now."

"The question of when and how (to leave), I believe will be part of the presentation by Cameron on Tuesday," said the official, asking not to be named.

"The position on the part of the other leaders is that they stand ready to start this process as soon as possible, as that is the best interests of the UK and the EU," he added.

All 28 EU leaders will meet Tuesday, with a dinner that evening where Cameron will brief his peers.

The other 27 will then meet without Cameron on Wednesday to discuss their position in light of the Brexit crisis.