British Prime Minister David Cameron remains locked in talks with leaders in Brussels, over his EU reform demands. <br /><br /> One official says they have hit “critical” snags.<br /><br /> “We made some progress, but there is still no deal and, as I have said, I will only do a deal if we get what Britain needs,” said Cameron, heading back into talks on Friday. <br /><br /> “So we are going to get back there. We are going to do some more work, and I will do everything I can.”<br /><br /> There have been all night talks and a series of private meetings.<br /><br /> Cameron is aiming to seal a deal to use to campaign for Britain to stay in the EU, in a planned membership referendum, which could take place in June.<br /><br /> Financial safeguards and migration curbs have proved to be contentious issues.<br /><br /> “During the night there were some proposals exchanged between us, notably concerning France,” said French President Francois Hollande.<br /><br /> “There is the will to have a financial regulation which can be applied to all financial capitals of Europe,
