ABERDEEN, SCOTLAND - MARCH 17: First Minister of Scotland Nicola Sturgeon poses for a photograph with a love heart at the spring conference on March 17, 2017 in Aberdeen, Scotland. Addressing delegates at the spring conference this morning in Aberdeen today, deputy leader Angus Robertson claimed that the Prime Minister Theresa May 'panicked' in turning down calls for a referendum on independence. (Photo by Jeff J Mitchell/Getty Images)

ABERDEEN, SCOTLAND - MARCH 17:  First Minister of Scotland Nicola Sturgeon poses for a photograph with a love heart at the spring conference on March 17, 2017 in Aberdeen, Scotland. Addressing delegates at the spring conference this morning in Aberdeen today, deputy leader Angus Robertson claimed that the Prime Minister Theresa May 'panicked' in turning down calls for a referendum on independence.  (Photo by Jeff J Mitchell/Getty Images)