@Rollerbird
First off I've had NO artificial sweeteners this week, I've drunk 4 or 5 pints of water every day, one with an electrolyte tablet.
Unfortunately, those electrolyte tablets probably do have sweeteners in them! That said, I'm sure one a day is fine.
I've had my coffees with single cream. Or unsweetened almond milk.
Double cream would be better, as there is more fat, but this seems fine.
First meal some veg. Friday about half a white cabbage chopped up and when cooked, butter added drizzled with sesame oil for taste.
Is this all you had?! There's very little protein here and, probably, not that much fat either - so you've just eaten carbs really.
A bit later Friday more cabbage, cooked the same.
I wasn't hungry at all after and didn't eat anything else.
Saturday. Cabbage same at lunch.
I have to ask you why you're choosing to eat like this?
Nighttime steak, mushroom with cream sauce, cauliflower.
This sounds good. but just to check - did you use flour/cornflour to thicken the mushroom sauce?
Sunday. Nothing until big family roast at about 2pm
Starter prawn cocktail
Main gammon, turkey, cauliflower with grated cheese, celeriac mash, one spoon of carrot and swede mash.
This all sounds fine
Overall, my main comment would be that you don't seem to be eating enough - probably not enough fat and certainly if you're only eating cabbage, not enough protein.
Are you drinking any alcohol as well?