Scotland’s first minister apologises and says "not wearing a face covering even for a few seconds was an error".
The Met Office issues yellow alert for Scotland and northern England.
The first minister said her advice would not be enforced by law but asked people to minimise their socialising in the run-up to Christmas.
US congresswoman tries drink at the Cop26 summit in Glasgow: "Oh my God, love it, love it."
Met Office specialists predict more light shows might be on the way for Thursday night too.
The US president was seen nodding off while on camera during the UN's pivotal climate summit in Glasgow.
Only seventh time the month has seen the mercury rise above the mark in the last 50 years.