Nicola Sturgeon's bombshell decision to step down as First Minister marked a tectonic shift in Scottish politics.
As the longest serving Scottish premier, Ms Sturgeon maintained a steely grip on power over nearly nine years in office, leading the party to dominance following a landslide victory in 2015 general election which left Labour with just one MP north of the border.
But a string of political rows appeared to take its toll, culminating in Ms Sturgeon's shock resignation in February.
