Prime Minister David Cameron has said he hopes Britain and France can open up a new front in the fight against violent extremism by working together to prevent the radicalisation of young Muslims.
After talks with French prime minister Francois Fillon, Mr Cameron said: "I am becoming increasingly convinced it is not enough just to target violent extremism - we have to target extremism itself.
"We have to drain the water from the swamp in which the violent extremism grows. I am sure that Britain and France can work together on this and learn from each other."
The Prime Minister also promised that Britain will not be drawn into "new mechanisms or new procedures" in a bid to save the euro.
Mr Fillon is urging the UK to back further European integration, and Mr Cameron said he wanted the eurozone to tackle its problems.
But he stressed there was no prospect under his premiership of Britain ceding more powers or becoming part of eurozone mechanisms.
"A strong and successful eurozone is in Britain's interests, we want the countries of the eurozone to sort out the difficulties they have and we won't stand in the way as we do that. Indeed, we will be a helpful partner in making sure that happens," Mr Cameron declared.
"But let me again be clear - that does not mean that Britain should be drawn into new mechanisms or new procedures or have to give up new powers.
"That is absolutely not what we see as necessary as happening and throughout the European Councils last year we made that point and secured that point on many, many occasions."
Mr Fillon had used an interview with The Times to indicate that he would be using Thursday's meeting to urge the Prime Minister to support further harmonisation of EU economic and fiscal policy.