People need to use common sense.
Fill up your tank when it is low and make it last.
If I'm working a tank lasts less than 6 days, can't make it last more.
Can you cycle your child on their school run? Or buddy up with another parent and car share?
DC all walk to school.
Can you car share with someone at work, or work from home a bit more?
No one lives near me, plus I need my car once I'm at work. Not allowed to work from home.
Can you order your groceries online to be delivered? Or cycle to your local shops daily to get just what you need for the day?
Do that, small shops round corner or go to supermarket on way home from work.
I know you will say "so this wasn't aimed at you" but the point is many people already do limit their car use, the ones like a couple of parents that DH sees everyday driving their DC to school which for one is less than a 5 minutes walk, the other barely a minute are not going to change (and they drive straight home again) The 5 minutes one probably takes nearly as long in the car as you can't drive the route you walk, plus there are lights.
I have about half a tank so should hopefully be ok to get to work on Wednesday, hopefully I'll be able to get some at that point, even if I do have to use the £££ service station ones. I'm only not out being part of the panic buying because I really can't be bothered to move off my chair.