The article was written two days before Johnson shocked David Cameron by publicly opting for ‘leave’

Boris Johnson’s secret newspaper column, urging Britain to stay in the European Union, is published by The Sunday Times today.

The man who led the Brexit campaign before becoming foreign secretary declared: “Britain is a great nation, a global force for good. It is surely a boon for the world and for Europe that she should be intimately engaged in the EU.”

Johnson’s unpublished article rehearsed warnings that Brexit could lead to an economic shock, Scottish independence and Russian aggression, only two days before he concluded that Britain would be better off out.

The article is revealed in an explosive new book that also discloses how David Cameron’s aides blamed two of Britain’s top mandarins for vetoing tougher demands in his renegotiation with Brussels.

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