I know this sounds crazy...but I had the same problem, and it turned out that it was a combination of hitting thirty and NOT eating enough!!
The body goes into starvation mode when we dont eat enough calories in a day, and it stores every one it DOES have, as fat, thinking its a famine!!
Try tweaking your diet?
Out goes the belvita...in comes fresh fruit and low fat yog, or porridge
Out go the biscuits...try fruit again or some nuts or whatever healthy option takes your fancy.
Is the chicken soup tinned?
How about trying to make your own...simple recipes abound and it wont cost you the earth either!
Dinner can be salads or baked spuds with tuna ...go online, there are endless suggestions!
Not being rude, but your diet reads sooo dull...
When I hit my thirties, it slowly became obvious that I was going to have to work a lot harder to even maintain the weight I had been since I was 15!
I even had to start doing much more exercise..not rushing off to the gym...but walking more and taking the stairs instead of the lift etc...
Its like having to run full tilt to stay still...NOT FAIR!
Diet clubs work for some...but they do cost, AND I know of several women who have lost massive amounts and then piled it all, plus more, back on!!
Same with the vlcd....yes the weight goes..but as soon as you return to your usual pattern of eating, its all back with a vengeance!!