Labour is urging its voters not to back Brexit

Many Labour voters do not know the party backs remaining in the EU and it could lead to a Leave vote in the referendum, senior party figures have warned.

Former leader Ed Miliband said the referendum result was "in question" and urged Labour supporters not to use it as a protest vote against the Tories.

The party's top brass is warning Labour voters would be hit hardest by Brexit.

BBC's deputy political editor John Pienaar reports from West Bromwich.