David Cameron has been speaking to ITV Border's Scotland Political Editor Peter MacMahon at the Scottish Conservative Party conference.
When asked whether there would be border controls between Scotland and England this was Mr Cameron's response.
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Trail hunting, where a scent is laid for hounds and the hunt to follow, has been widely practised since the 2005 ban on fox hunting.
Dangerous chemicals stored in a laboratory at the nuclear reprocessing plant have now been detonated by an army bomb disposal team.
Explosives experts were called to the nuclear reprocessing site in Cumbria, to help deal with chemical substances.