To be clear on the shopping trolley issue: This is about essential and necessary journeys, not what’s in your trolley. I have been clear that we will not be judge and jury on what is an essential item or not, but we may now probe the purpose of the journey
As I said on another thread, this is actually the same thing expressed a different way, he's just trying to use weasle words. He's saying that if an officer decides your item is non-essential, then by definition your journey must have been. And he's also assuming everyone goes to the supermarket by car rather than walking/cycling, which could be your daily exercise combined with a small shop (or a big shop if you have a cycle trailer).