That's reassuring Stix, ta! I have been gymming it for about a month, but this week has been properly menkul everyday-like, so I might be plateaued this week. Pliz to direct me to above reassurances when I have a colossal childish strop tomorrow morning 
I've remembered I promised a breakdown of the SW principles to those who wanted them, so see below. Other SWers please add or correct as need be!
Essentially, food is split into 3 groups:
FREE FOOD, of which you can eat unlimited amounts
HEALTHY EXTRAS, of which you may eat set amounts daily
Syns everything else, of which you may have between 5 and 15 a day.
Additionally, food is split into RED or GREEN days, and the day which you choose to undertake will determine what constitutes the free food. I'll list some examples below:
RED DAY
All lean meats and fish are free (this includes smoked fish and tinned fish in tomato sauce). you can eat unlimited amounts.
All fruit and veg are FREE except starchy veg such as potatoes and sweet potatoes etc.
GREEN DAY
All rice, potatoes, lentils, pulses, beans, pasta are free. You can eat unlimited amounts.
Again, all fruit and veg are free.
Other free foods - free on both days - include fat free natural yogurt, quark, mullerlight yogurts, fat free cottage cheese, EGGS (the bliss!) most seasonings and stocks.
HEALTHY EXTRAS
On both RED and GREEN days you can have 2 Healthy Extras from the A list, and 2 from the B list. This ensures you have enough fats, dairy, calcium, fibre etc. I can't remember them all, but I'll list the ones I use most (I have lost my book!).
HEALTHY EXTRA A
1 oz cheese
1 tbsp extra virgin olive oil
1 tbsp tahini (I think?!)
1/3 pint milk
HEALTHY EXTRA B
2 slices small loaf wholemeal bread
1 baked apple with 1 tbsp mincemeat
various cooked or stewed fruits (with no sugar)
about 1oz muesli
small portions of various cereals
there are more complicated things like Extra Easy and there is far more variety in the Healthy Extras, but that's the basics.
Because like A TOTAL SWINGING TIT I have joined and left SW 2 or 3 times in the last few months I do have a couple of books hanging around. If I can find a spare I am more than happy to post it to whoever wants it. you do often find them up for sale on eBay too.