Saeed Pourreza
PRESS TV, London
We're used to the revolving door of Westminster politics with Prime Ministers coming and going at dizzying speed. North of the border things have been much more stable for many years---until this week.
Speculation is rife about why she quit, such as the impact of the pandemic, and the UK’s top court ruling last year against the Scottish government's ability to hold a second independence referendum without approval from the British Parliament.
Sturgeon's resignation has also raised the important question of what will happen to Scotland's independence aspirations in her absence from frontline politics---after all she was the architect of the referendum in 2014, and has pushed for a second one since the first didn't get a majority vote.
With that in mind, a lot will depend on who emerges as a leader of Sturgeon's Scottish Nationalist Party.
Successive Conservative governments here in England have said the 2014 referendum was a once-in-a-generation decision and could not be repeated any time soon.
In response Sturgeon said she'd turn the next general elections into a de facto referendum to ramp up pressure on London to grant another vote. But without her in the lead, it is now up to her successor, to deliver what she promised.