There is the option of the full breakfast "in a bun", or actually a Stottie.
A Stottie is a type of large bread-bun-esk loaf around the size of a small dinner plate or a large side palte, and is about an inch and a half thick.
It has a very dense crumb, making ideal to be cut in half (2 semi circles) the sliced carefully to make a pocket to allow your full fried breakfast (bacon,sausage,fried eggs, beans if you wish) of choice to be inserted and eaten on the go.
Ideally with runny fried eggs so the yolk drips down your chin, or "kept for later if you have a beard"
Oh for a time machine to visit that particular Van in Team Valley about 30 years ago!!!!