Quite right, rods must be attended at all times - it's fine discussing a survival situation and I'm sure we all agree we would obtain food by any means available. however, that does not mean we can go out and practice it here in the UK.
Yup, sorry, as you say this isn't a thread about survival, but about legalities of leisure angling in the UK with a licence and landowners permission.
I suspect the eating of the fish is what the outcome will be in bushcraft fishing. But tethering of the fish (there are probably specific rules concerning hooked fish and responsibilities in the event of), or harm and unecesarry suffering through incorrect eqiupment of anysort is what the rules are there to protect the fishing stock from, and some stocks being significantly more lucrative than others, primarily the large prize fish, they like to be able to protect the fish stocks with many many limitations. That being that, a hand reel could obviously be used in an acceptable way on small fish. There are a few contradictions in the tackle rules I have always thought if the welfare of the fish is paramount in the formulation of the rules, if you are using a certain type of tackle to fish for the smaller fish, should this tackle not be of good enough grade to land the largest fish possible from that river, not just the species you are fishing for. You can fish for small fish even with a rod, problem is you can't make sure the large fish do not bite.
As for a home made(or field made diy) pole rod, I wouldn't mind having a go but I should think that your tackle shall first have to stay within the rules(and there are a few of those), and as for the rod pole it would probably have to have a certain flex as you say, it would probably have to be a certain length, longer than a basic rod and reel, the line would have to be secured so it would not in anyway break or become loose, so I reccon at the pole end you would need at least some sort of shock absorbing elastic stuff as the pole would probably not be flexible enough to pass as a rod pole.
Edit: also found these statements;
From The Cambridge English dictionary‎
"angling;noun
‎the sport of trying to catch fish with a rod,line (= plastic thread),
And hook (= curvedpiece of wire)"
‎Whilst according to wikipedia
‎
"Angling
‎
‎Angling is a method of fishing ‎by means of an "angle" (fish hook)"
‎
So I thought the Internet was full of‎;
"supposition
‎NOUN
a belief held without proof or certain knowledge; an assumption or hypothesis:‎"