Thanks for the support guys 
Been back on it since Tuesday but yesterday DS came down with chicken pox so my resolve is being well and truly tested. Yesterday's food was a bit all over the place and dairy/processed heavy yet again. Very little sleep with itchy DS and DH away til Saturday but will try and stick with it.
Yesterday
B: half pot of M&s cheese and onion sandwich filler, crispy bacon strips
L: eaten over afternoon - few pork scratchings, chunk of cheese spread with butter and marmite, two squares of 85% chocolate
D: Courgetti w pesto, mushrooms, cream and cheddar
Also managed three litres of water
Today's plan:
B: Greek yog, cream
L: Aubergine, mozzerella and Tomato stack, coleslaw
D: Slow cooked chicken thighs, with tinned toms, mushroom, courgette, leek, pepper, shallot, garlic, cauli rice
Suspect I will have a few squares of choc again too.
So too much dairy again, but having to eat what I can as my shopping isn't coming til tomorrow and physically going to the shop is not an option with a spotty, grumpy, tired five year old.