Just in from Buckinghamshire County Council:
"KEEPING MAJOR ROADS and key routes open will be a priority as the county council takes action to implement a salt rationing plan. Due to continued severe weather conditions the council will set in place a plan to ensure that the county's salt reserves are used in the most effective way possible.
From tomorrow (7 February) standard gritting schedules will be replaced with a rationing plan. This plan will see salting kept to A and B roads only - but with the addition of some key routes into settlements that have been identified as priority to keep open."
You can read the full statement and see which roads will/may be covered here.
