David Cameron is beginning a crucial week in his renegotiation of Britain's membership of the EU.
The Prime Minister will embark on a final diplomatic push before a crunch Brussels summit where he is hoping to secure a new membership package.
He will also have to convince senior government figures to support the deal.
Here are some of the key moments that lie ahead for Mr Cameron this week.
After holding meetings in London, the Prime Minister will travel to Paris in the evening for talks with President Francois Hollande.
Securing French agreement to a package of EU reforms will be crucial if a deal is to be reached in Brussels at the end of the week.
The Prime Minister will meet the president of the European Parliament Martin Schulz in Brussels, along with the three MEPs who have been appointed "sherpas" for the renegotiations, Guy Verhofstadt, Roberto Gualtieri and Elmar Brok.
He will then have separate meetings with leaders of the Socialist and EPP groupings in the European Parliament, Gianni Pitella and Manfred Weber.
European Council President Donald Tusk will publish the final draft proposal, which could give an indication of any changes during the past two weeks of negotiations.
The crucial moment comes at the end of the week when Mr Cameron attends a meeting of the European Council.
At the summit, EU leaders will try to agree a new deal for the UK to remain in the EU.
The discussions will start over dinner in Brussels, with negotiations potentially going late into the night.
If a deal is not agreed on Thursday night, leaders are expected to continue discussions on Friday.
Mr Cameron is expected to hold a press conference once the deal is done.