Prime Minister David Cameron has described Tory MP Douglas Carswell's defection to UKIP as "deeply regrettable" and "self-defeating".
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Known as 'spice' and 'black mamba', the so-called legal high is suspected of contributing to deaths in male and female institutions.
Prince Harry will launch the countdown to the 2017 Invictus Games in Canada - as he gears up for the this year's event in Florida.
The government has announced plans to ensure staff receive tips left by customers in bars and restaurants.