so your not doing a carb control program and your in the 3s and 4s. without any bg lowering meds. its unusual for a fit young man to start with type 2 but not unheard of. your steak butty and chips what was the highest it raised your bg. because if i eat just a couple of chips. my bg goes high. if you were in the 30s i would be expecting you to be quite sick. you mention also that youve dropped to 1s without any effect. thats very unusual as well. and very concerning. you really need to get a full diagnosis because its not a typical picture for type 1 or 2. defiantly get the gad,cpetide and maybe even a dna tests done. not being aware of hypos is very serious.