Scotland's leader Humza Yousaf resigned, further opening the door to the UK opposition Labour Party to regain ground in its former Scottish heartlands in a national election expected later this year.

Yousaf quit as head of the pro-independence Scottish National Party (SNP) after a week of chaos triggered by his scrapping of a coalition agreement with Scotland's Greens.

He then failed to secure enough support to survive votes of no confidence against him expected later this week.