Lancashire has agreed a deal to enter Tier 3 – the highest level of England Covid restrictions, the BBC has been told.
An official announcement on the new measures is expected at 11:00 BST.
It will become the second part of England, after the Liverpool City Region, to go into Tier 3.
The “very high” alert level measures include pub closures and bans on household mixing indoors, in private gardens and most outdoor venues.
The move comes as talks between Greater Manchester leaders and central government over putting the region into Tier 3 have stalled.