Gordon Brown pacing stage giving passionate speech
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Gordon Brown says Britain should be 'a leader' in the EU

The former Prime Minister, Gordon Brown, has made a passionate defence of Britain's membership of the EU - and called for the UK to lead the EU, not just be a member of it.

Meanwhile, the former mayor of London, Boris Johnson, helped the Vote Leave campaign launch its official battle bus this morning.

Tom Bateman reports.

Go to next video: Cameron and Johnson's EU battle intensifies