Dave,
I'm in the Uk also, and like you, I don't carry a PSK. I do have a large, variable EDC. I live in the country and spend much of my life outdoors. This means that my EDC usually includes a large folding saw (Bahco Laplander) as well as a fixed blade + a lot more stuff.

Like you I don't carry any food or foraging equipment, but I do have a fair knowledge of wildfoods. Knowledge plays the part of a huge amount of gear that you could carry, and it weighs nothing. Once you have a knowledge base, you can see that practically every plant in the british hedgerows is edible!

Sorry this is a bit of a waffle.