Britain's prime minister, David Cameron, is heading to Brussels to persuade skeptical members of the European Parliament to back a package of reforms ahead of a key summit this week.

Cameron wants European leaders at the summit to accept reforms so he can call a June referendum on whether Britain should remain in the European Union.

The British leader will hold talks Tuesday amid criticism that any reform package could be vetoed by lawmakers after the referendum because it will not be secured by a change in the EU treaty.

The meetings come a day after Cameron traveled to Paris for talks with French President Francois Hollande. Cameron's Downing Street office says the leaders agreed a draft of reforms "provides a firm basis to reach agreement at this week's summit."