Gritter driver shortage?

Franglais:

Sixties boy:
Also gritting falls under “emergency” procedures, so you can ignore EU and domestic hours regs.

I did wonder about that.
“Exemptions
You do not need to follow the GB domestic rules if you:
are dealing with an emergency - for example, a major disruption to public services or danger to life”
gov.uk/drivers-hours/gb-domestic-rules

Is all gritting an emergency?
Or, in some circumstances, could be?

No, most of it is pre-planned treatment following a weather forecast earlier on.
At our local authority, the drivers can be messed around due to sticking to domestic hours rules, eg start at 7.30 sent home at 9.00, come back at 14.00 - 23.00,