The Clacton MP quits his party but insists he will not rejoin the Conservatives or trigger a by-election.
Local MPs Ruth Smeeth and Rob Flello have sought legal advice.
The Ukip leader also apologised for failing "to check what was put up on my website in my name".
The Ukip health spokeswoman launched a bid for Labour's policy heartland, the NHS.
The break-up of the UK is a convenient warning for both opponents of Brexit and nationalists alike.
In an era of far-right populism, an avowed centrist could see off France's political demons.
The essence of democracy is the right to change your mind at a later date.
A large number of left-wing activists in London have headed north. But they must be prepared to contemplate defeat.
Busy man, clearly.
The news that the Irish government has begun preparing for customs checks has caused alarm.
Labour feels optimistic about Stoke, but Copeland is on a knife-edge.
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