EU Referendum: Cameron wrangling ahead of summit British officials have entered the final phase of negotiations to change UK's relationship with the EU, the day before the European summit begins. Prime Minister David Cameron hopes to agree to a deal at the Brussels summit. This is to enable a referendum on the UK/ EU membership to take place as early as June. European Parliament President, Martin Schulz has warned that members of EU Parliament's backing for any deal cannot be guaranteed. Mr Cameron's planned curbs to benefit EU migrants appear to be a sticking point in the talks with the EU, with some eastern European countries reported to be opposed. Reports say most diplomats were confident a deal could be agreed this week and a date for a referendum could be known on Friday. BBC