+1 for keeping a food/exercise diary. Your diet doesn’t sound very exciting and to me (through my non qualified knowledge) looks like you might not be eating properly to be honest. Cornflakes and bread are not healthy as such and its those sorts of traps people fall into when trying to lose weight thinking they are being good when actually they arent and to be honest you probably aren’t eating enough to keep you going on all your exercise. We’ve been sticking to a paleo type diet (yes a bit fad I know) and it is working wonders.
Just a brief outline of what we have/do in a day:
Breakfast: fruit with handful of nuts, fruit tea or something like eggs and asparagus or eggs, mushrooms grilled tomatoes etc
Mid morn: nuts, blueberries
Lunch: massive salad with feta cheese or smoked salmon or chicken with extra virgin olive oil, balsamic vinegar
Mid afternoon: cherry tomatoes, fruit, seeds, carrot sticks
Dinner: either salad or veg, loads of protein of some sort. Dark chocolate for pud.
You would have to eat more depending on your size and exercise but we stick (as much as possible) to no dairy, grains etc but most importantly, no processed food (feta an exception in this case but it’s good protein I believe). Cornflakes, bread and low fat yoghurt are processed. You get the idea and it sound hideous but actually it’s really not that bad. Exercise wise we both do an hr or so 4 times a week, mix of weights, cardio etc and weve both lost weight but most importantly we feel amazing.
Read a couple of paleo books, they are a bit full on but give some good starting points to get you going. Good luck!