I filled up on Monday at the very first sniff of a problem and there were no problems and no queues
A fuel "shortage" caused by everyone topping up, and keeping topped up, plus filling all their can's etc will only be a short term blip. Once everyone's can is full. demand will return to normal.
What's more likely to be a problem, is for the foreseeable future, I will be filling up whenever I get to half a tank. I normally wait until I'm almost running on vapour before filling.
So I will be visiting the petrol station twice as often as I used to. So if everyone does that, it must lead to longer queues although it shouldn't lead to a shortage as I won't be using any more fuel, just topping up with smaller amounts more often.
The Government never learn do they. Going on the news and saying "there's no need to panic" is about the best thing you can possibly do to get everyone panicking. They might as well have said "fill up today there might not be any tomorrow"
If they really want no panic, then just SHUT UP about it.
I think that just shows how little trust we have in our politicians. We just don't trust what they say.