Ok Carrie so I come from the point of view of trying to make sure you eat what your body needs nutritionally...essential fatty acids, protein, a certain amount of carbohydrate, plenty of veg for fibre and nutrients - and I can't see much of these.
Your breakfast each day gives you no fat, no protein, no fruit or veg and this is when you really should make sure you get fat and protein as it tend to set the tone for the rest of the day.What other things do you like? Could you have greek yoghurt with fruit and some raw nuts, or porridge with banana, perhaps eggs done any way you like? Nut butter on the rye bread would be better than jam, at last then you will get some fat.
A cheese sandwich/pizza is giving you fat and protein at lunchtime but isn't the ideal source of either, once a week it would be ok but you could do with switching it about a bit, maybe choose soup or a big salad with chicken or tuna, some beans or chickpeas along with whatever veg you like?
Can you think of how you can add a bit more veg and incorporate things like avocadoes, eggs, raw nuts, olive or coconut oil, olives, salmon, sardines into daily meals?
Just to clarify, where/why do you feel you have overeaten? When exactly did you eat your snacks? Is it always an evening thing? Were you genuinely hungry then? Can I suggest alternatives to the crisps and chocolate?
Mrs makes a very good point about slow eating. The very first thing I do with all my clients is to get them to slow down when eating, 90% of us eat too quickly and often mindlessly. This puts our bodies into a state of stress whereby digestion and metabolism is compromised and cortisol is produced. All of which means we don't use the food we eat properly, it can cause tummy problems and the cortisol tells our bodies to store fat - relaxation and mindful eating does the opposite. I don't specify a minimum number of chews, but taking a moment to contemplate a meal, to relax and then try and really enjoy it in a slow and leisurely way, if possible, without any distractions like the TV - taste it, make it a pleasurable rather than a functional experience. It is impossible to eat mindfully when you are 'wolfing' food down 
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Someone better start the new thread!!