This is what I've heard in full:

Tier 3 to Tier 4:

Essex [remaining areas]
Surrey [remaining areas]
Oxfordshire

Tier 2 to Tier 4:

Suffolk
Hampshire
West and East Sussex

Tier 2 to Tier 3

Northampton
Warrington
Cheshire East
Cheshire West
Chester

Tier 1 to Tier 2:

Cornwall

— Steven Swinford (@Steven_Swinford) December 23, 2020