Participants in yesterday's anti-badger cull protests were reportedly seen chasing BNP supporters down London's Whitehall, reports the International Business Times.
The BNP and EDL march was opposed formally by activists from groups including Unite Against Fascism and Hope Not Hate.
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The race for number 10 dominates the Sunday papers.
A man in his 20s is recovering in hospital after being stabbed in north London on Saturday night.
The Scottish Government has also set up an independent working group for missing people, made up of experts in the field.