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EDINBURGH, SCOTLAND - MAY 19: Britains's Prime Minister Theresa May gives a speech at the launch of the Scottish manifesto on May 19, 2017 in Edinburgh, Scotland. The Scottish Conservative manifesto includes commitments to the Borderlands Growth Deal and protecting farming income as well as support for remote Island wind energy projects and North Sea industry support. The British Prime Minister, Theresa May, supported the manifesto with a visit via the Conservative campaign bus. (Photo by Jeff J Mitchell/Getty Images)

EDINBURGH, SCOTLAND - MAY 19:  Britains's Prime Minister Theresa May gives a speech at the launch of the Scottish manifesto on May 19, 2017 in Edinburgh, Scotland. The Scottish Conservative manifesto includes commitments to the Borderlands Growth Deal and protecting farming income as well as support for remote Island wind energy projects and North Sea industry support.  The British Prime Minister, Theresa May, supported the manifesto with a visit via the Conservative campaign bus.  (Photo by Jeff J Mitchell/Getty Images)

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EDINBURGH, SCOTLAND - MAY 19: Britains's Prime Minister Theresa May gestures as she gives a speech at the launch of the Scottish manifesto on May 19, 2017 in Edinburgh, Scotland. The Scottish Conservative manifesto includes commitments to the Borderlands Growth Deal and protecting farming income as well as support for remote Island wind energy projects and North Sea industry support. The British Prime Minister, Theresa May, supported the manifesto with a visit via the Conservative campaign bus. (Photo by Jeff J Mitchell/Getty Images)

EDINBURGH, SCOTLAND - MAY 19:  Britains's Prime Minister Theresa May gestures as she gives a speech at the launch of the Scottish manifesto on May 19, 2017 in Edinburgh, Scotland. The Scottish Conservative manifesto includes commitments to the Borderlands Growth Deal and protecting farming income as well as support for remote Island wind energy projects and North Sea industry support. The British Prime Minister, Theresa May, supported the manifesto with a visit via the Conservative campaign bus.  (Photo by Jeff J Mitchell/Getty Images)

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EDINBURGH, SCOTLAND - MAY 19: Britain's Prime Minister Theresa May (L) and Scottish Conservative leader Ruth Davidson arrive at the launch of their Scottish manifesto in Edinburgh on May 19, 2017. (Photo by Jeff J Mitchell/Getty Images)

EDINBURGH, SCOTLAND - MAY 19:  Britain's Prime Minister Theresa May (L) and Scottish Conservative leader Ruth Davidson arrive at the launch of their Scottish manifesto in Edinburgh on May 19, 2017.  (Photo by Jeff J Mitchell/Getty Images)

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Britain's Prime Minister Theresa May (L) and Scottish Conservative leader Ruth Davidson shake hands at the launch of the Scottish manifesto in Edinburgh on May 19, 2017. / AFP PHOTO / POOL / Dan Kitwood (Photo credit should read DAN KITWOOD/AFP/Getty Images)

Britain's Prime Minister Theresa May (L) and Scottish Conservative leader Ruth Davidson shake hands at the launch of the Scottish manifesto in Edinburgh on May 19, 2017. / AFP PHOTO / POOL / Dan Kitwood        (Photo credit should read DAN KITWOOD/AFP/Getty Images)