"...and I've put together a survival tin and I'm currently putting together an accompanying pouch like in the sas survival guide with a mess tin...main backpack or is the mess tin and hexy cooker...."
"...It's not actually going to be used for the uk, I'm going travelling next year and I'm going to be going off the beaten track if it were..."
You are putting too much thought an effort into what you imagine you might be getting up to out in the world.
You do not need a survival tin, pouch, hexi fuel etc.
You need to have a good few phrases in the languages used in the countries you plan to visit.
You need a very comfortable 'non gucci and new' looking backpack of around 50 litres.
You need a nice pocket knife that won't look like a weapon to border control agents and police officers.
You may need a camera and a notebook.
If this is a long journey to faraway places expect to lose most of the stuff you leave the UK with, don't worry about it. Everything you will need can be found, bought, traded for or improvised pretty much anywhere.
Have fun, post some pictures or write about your time on the forum when you return.