Donald Tusk says he got the letter from Theresa May today.
He spoke to her just now, he says.
In the light of his consultations, he says a short, extension will be possible.
But it will be conditional on a positive vote on the withdrawal agreement in the Commons.
- Tusk says EU will only give the UK a short article 50 extension if MPs pass the Brexit deal.
He says, if there is a positive vote in the Commons next week, the extension can be finalised using a written procedure.
But, if needed, he will call a summit next week.
