She's getting 1200-1500 calories but claims to not be starving herself.
I'm losing weight on > 2000 calories, and I am slimmer than Yawn. Just a bit of calorie counting, no shakes required. Hell, my BMR is over 1500, with a TDEE generally around 2400-2500.
But Yawn, you are starving yourself. 1200-1500 calories is fine for someone who is tiny. You, however, aren't tiny. And that's fine, but FFS, don't starve yourself! Tailor your calories to you, not to some number based on people smaller than you.
It took only four days to cure herself from being a bread-, cheese-, pastaholic. Righty-ho. I get to eat all of those things. I get to eat chocolate. None of them are evil, Yawn, especially not chicken and prawns! Stop demonising perfectly normal foods, that's one way of starting eating disorders.
And don't promote the bell end that is Joe Wicks