How could MPs who want Sir Keir Starmer to be replaced force a leadership contest and who could stand?
The Tories take Aberdeen South, while the SNP wins in Arbroath and Broughty Ferry.
The Reform UK leader says he is "disappointed" with his party's performance in the key by-election.
Police say a man arrested on suspicion of attempted murder has been bailed.
Temperatures are expected to peak in the mid-30s Celsius on Monday and Tuesday with impacts on health and a risk of disruption to travel.