First Minister is expected to confirm that East Renfrewshire will be placed at Level 3 of lockdown despite having only been placed at Level 2 from Monday.
It means dozens of businesses will need to either close or alter their trading to comply with tougher rules.Glasgow is expected to remain at Level 3 with cases in the city suggesting it could be weeks before restrictions can be eased safely.
It follows a spike in the number of people testing positive for coronavirus, with the outbreak centred around the Pollokshields district in Glasgow's southside.
Much of East Renfrewshire forms a continuous urban area with Glasgow, meaning the virus could quickly spread between households.The suburban council area yesterday overtook Glasgow as.