Well being as you can't go that far off the beaten track in the UK, the snare and fishhooks seem superflous to any real need, and I could cynically say that a zippo lighter with spare canister, SAK and a few balls of cotton wool are sufficient to meet any fire lighting emergency.
It does get you thinking though because bad luck is bad luck and if you are immobile survival is going to depend on someone finding you.
It occured to me this summer, having fallen into a bog in Wales and got me leg stuck. "What if I cannot pull it out?" I knew where I was, (even if the path I was supposed to be on was invisible) and I wasn't that far from a main road, which I could see above me. However since I was essentially dressed in the same colour as the landscape, could anyone have seen me? and if they could would they even think I was in any kind of trouble. Cell phone wasn't working and I guess the only thing I could have used to signal my distress would have been a whistle, mirror would not have been much use, no sun, of if I was benighted (God forbid) an led flashlight.
If you do fall an injure yourself even a little way out your only hope is that someone stumbles across you before you die from exposure, you don't even have to be any where remote to die from the weather, you can even be in your car in a layby.
That being said in reality the greatest hazard I probably ever face is driving out to the 'wild' country
Well my real lesson was that fancy goretex boots are a waste of money, once you get them wet on the inside they will never dry out, carrying a spare pair of sandals in my rucksack was probably the most sensible thing I had on me, kept my feet from an unpleasant fate anyway.
Another lesson I learnt elsewhere is that those silly little plasters you get in FAK's are next to useless. I have since taken to carrying a roll of sports tape to keep anything in place along with those non absorbent dressings you can cut to size.