The upcoming Rochester and Strood byelection is being seen as a "must win" for the Conservatives.
The byelection was triggered by Conservative MP Mark Reckless' defection to Ukip.
ITV News Political Correspondent Romilly Weeks reports as David Cameron makes an early visit to the constituency:
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Weekend newspapers printed stories suggesting the couple are planning the move.
Another warm day is forecast for much of the UK.
The study used expose-style articles to see how they would impact teenagers’ behaviour.