"going for a burton" was a euphamism for "giving birth to an officer" (ie doing a #2) at the university regiment I gained my commission in (for obvious reasons as we were all putative officers :-) )
My diabetic educator & dietitian actually advised eating an egg (boiled or fried) with 1 slice of toast(and specfied a brand & variety) and real butter for brekkie as the lowest calorie + lowest GI brekkie short of those godawful VLCD shakes -it worked , I lost about 3.3 jubs (std reg units) over 3 months