The search for a new First Minister of Scotland has started - the third in three years - after Humza Yousaf announced his resignation yesterday in an emotional speech. Yousaf says he "underestimated" the hurt caused by his decision to scrap the SNP's power-sharing agreement with the Scottish Greens - a move that prompted two no-confidence votes. The polls suggest there is something more fundamental going on - a belief that ministers here in Edinburgh are simply not delivering the basics, like a health service that works and schools with high standards, even though it is they and not ministers in Westminster, who are in charge of those policies. Today's Nick Robinson spends the day in Holyrood reflecting on the fall out of another emotional resignation by another Scottish first minister. Listen to Today on BBC Radio 4 and BBC Sounds: 6-9am weekdays and 7-9am on Saturdays.