British Prime Minister David Cameron will meet French President Francois Hollande on Monday to discuss Britain's EU renegotiation issue, Downing Street said.
The meeting between Cameron and Hollande comes ahead of a crunch EU summit this week, AFP reported.
The European Union is trying to broker a series of reforms to Britain's relationship with the bloc ahead of a looming "in-out" referendum that could be held as early as June this year.
British officials hope a deal can be nailed down at an EU summit in Brussels on Thursday and Friday.
In London, Cameron's spokeswoman said: "We have made progress (on renegotiation) but there are details to be pinned down."
"Nothing is agreed until everything is agreed," she added.
A deal could pave the way for a referendum on whether Britain should leave the 28-member EU or stay in.
But some of Cameron's demands are proving problematic to his European partners.
Analysts say France -- which with Germany is considered the EU's engine -- is likely to want to see changes in what is being proposed over economic governance.
Cameron had wanted the European Union to recognise a series of principles including that countries outside the eurozone like Britain should not face discrimination or disadvantage.
The British prime minister also spoke to European Union chief Donald Tusk on Monday.
Tusk was first in the queue in Paris -- he met Hollande in the French capital before Cameron arrived.
Asked if he thought a deal could be pushed through this week, Tusk said in Paris: "I hope so."