European Union leaders are willing to find a way to reform Britain's ties with the bloc but there are limits to what can be done, Swedish Prime Minister Stefan Lofven said on Thursday, according to Reuters. British Prime Minister David Cameron set out on Tuesday his objectives for renegotiating Britain's relationship with the EU before a membership referendum which he plans to hold by the end of 2017. "Everybody has a will to solve this of course because we believe it is important that the UK stays within the European Union. I think it is good for the UK as well so we have a positive attitude," Lofven told BBC radio. The Swedish leader backed Cameron's call for safeguards for EU members which are outside the euro zone, such as Britain, but said restricting EU migrants' access to welfare payments, another of Cameron's proposals, could be more problematic.