Your food is not helping you.. You are having hypo's because of items such as milky ways, choc cake etc..your food choices are probably going up very quickly and coming down very quickly and your insulin cannot cope with this. As well, you probably have incorrect insulin qtys...
You are having zilch as nutrients...even working 10-10 you need to get your food balanced and your nutrients....
I know you work long hours but the choices of food on that day you have listed to be honest is poor.
You would be better off having a bowl of soup, preparing yourself a chilli or bolognese or something that has a reasonable level of nutrients in ie fat, onions, garlic, tomatoes, mushroms. You could prepare enough for 5 days and freeze it And take to work. If you haven't got a microwave at work then there plenty of better choices of cold foods that could be ate.
The lack of vitamins and minerals in your diary will be reflective in your brain and body functions.