In a rare turn of events, European Union ministers yesterday voted in a plan to set binding quotas on EU countries to accept migrants, having failed to reach a consensus.
Although the majority approved the plan, Romania, the Czech Republic, Slovakia and Hungary voted against the mandatory quota scheme. However the European Commission has said it will enforce them.
French President François Hollande, who was in London yesterday to discuss the Syrian conflict, among other things, has said countries in eastern Europe cannot expect to receive subsidies if they do not accept other obligations of being in the EU.
Cameron is also expected to use the summit to push for returning economic migrants to their home countries, as well as make his case for renegotiation of the EU.
The UK is not part of the relocation plan, but has said the UK will take 20,000 refugees from camps in and around Syria in the next five years.