Alex Salmond has pledged that one of the first actions of an independent Scottish government would be to "scrap the Bedroom Tax".
He compared the opposition to the so-called Bedroom Tax to that against the Poll Tax, and said it was a "symbol of why independence is necessary".
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A top temperature of 11 Celsius (52 F).
The event, which was held at the Dorchester Hotel last Thursday, was attended by representatives of some of Britain’s biggest companies.
Reports in the Daily Mail and the Telegraph said published guidance has been changed for 2018 to only fly the Union flag on Remembrance Day.