She could have Binge Eating Disorder or Other Specified Feeding or Eating Disorder. I can see patterns of body dysmorphia in her posts as well, she's a very tall and lean woman so her goal weight will not be or should not be the same as someone who is shorter than her. I really think her best option is dietician advice than slimming world. Slimming world is not a one size fits all thing and I find alot of slimming worlders save their syns up and binge at night which just encourages the behaviour that landed them on the plan in the first place. Then it can go the opposite way and some end up starving themselves, then gorging which leads to a damaged metabolism nevermind the mental consequences
I'm not shaming anyone on the SW plan, rather the plan itself and the way it's been constructed.