All three Scottish water authorities have been assessed 100% Blue, as has the entire water and sewerage industry in England and Wales and the water services in Northern Ireland.

But the regulator for England and Wales, the Office of Water Services (Ofwat) has said there is no room for complacency.

Ofwat will continue to monitor water companies and make sure they have "extensive and effective" contingency plans.

The only worry, according to Ofwat, is if people try to hoard by filling their baths and other containers on New Year's Eve.

Link: Ofwat

The Action 2000 traffic light codes:

Blue: The assessment has not identified any risks of material disruption to the infrastructure process.

Amber: The assessment indicates that there is some risk of material disruption to infrastructure processes, but that there is an agreed containment plan to rectify shortcomings.