Hellooo!!
I wouldnt dismiss the idea of red days out of hand - a change is as good as a rest and sometimes this can tip the balance, particularly if you are of the sort of body make up that stores carbs - limiting them via red days can be an excellent way to get things moving again.
Other things you need to think about -
bananas - yes, they are superfree but not a speed food and they are very high in sugars. Eating a couple of bananas a day really throws extra calories in there - plus if you ARE the sort of person who stores carbs, bananas are adding to the pile.
Secondly - when you do your food diary for this week - please detail every single thing including the brands, so you can check syn values of stuff. I can see that you are quite regularly oversynning, but I also think you might be consuming additional syns that you arent counting - perhaps the chicken slices you had the other day. If they were the Frys type, for example, they are very high in syns for what they are, so it would help us to work out whats causing the problem if you could put some extra detail in.
Are you mixing rice in with your yogurts or are they a type of yogurt that comes with rice in? Not really familiar with whats available in the vegan yogurt product range.
I understand that its frustrating when you arent losing well, but also consider that you are only a stone from your target, it isnt like you have 8 stone to go or something, so things may well be slow progress.
My suggestions are to go into your book, choose a range of super speed and speed foods and incorporate them this week when you would be having fruit. Also, you need to have 2 Hex Bs, but dont carry them over from one day to the next - if you miss one, for whatever reason, forget about it, dont then have 3 the next day. Cut back on the bananas, one a day max, preferably every other day - I would have those on the days you go to the gym because they are a great recovery food for after working out.
I would also try and bring yourself down to 10 syns a day, and stick to it, regardless of whether or not you exercise. If you find yourself sticking still, then up the superfree first and foremost, preferably with speed foods. For now, dont syn over a week, do it on a day by day basis and dont go over 10. Replace some of the snack-a-jacks with superfree too, if you can.
Other things to note, melon is superspeed unless its watermelon, when its not. Dont over eat either, eat till you are full but dont be forcing food down for the sake of it. If you are using olive oil as a Hex B - measure it before using it and measure your Hex As too.
PS, the vegan bacon is lovely