@MadamBuxton welcome. I know you said you're doing 'not-quite-bootcamp' but I'd advise you to have a good understanding of the rules in any case. If you don't have much to lose then you might find you have to cut back on the milk and the gin for a while it your weight loss stalls. It is delight to eat this way, and to enjoy the richness of butter and coconut oils and avocado and bacon... (I could go on!)
With regards to between bootcamps, some people stay on bc lite, others just carry on as they were doing. You won't undo all the work with one bowl of porridge, but you might with a bowl of porridge every day, and some roast potatoes, and some fried rice. Your body would store the excess as glycogen (with its associated water) and your weight would increase and you might feel bloated.
Essentially it is the combination of carbs and fat that are so difficult. Between bootcamps I might have one day when I eat a portion of higher carb food (chickpeas, or beans, or lentils) but I would usually eat less fat that day. Towards the end of bootcamp lots of people will be sharing their strategies. In the meantime you've got 7 weeks to get to grips with the rules (all of them), get used to drinking lots of water, and work out what your body tolerates / responds to - we're all different.
@ouchmyfeet as others have said, difficult to eat too much fat. Whilst I love butter and oils, and fatty meats / oily fish and have been known to slurp cream from the pot there comes a time when I just feel that I've had enough.
That is different to the lethal combo of carbs and fat which I feel I could eat for ever. For me it is crisps - the salty, crunchy, oily taste and feel; for others it the combination of sugar and fats (cakes, milk chocolate, biscuits etc). Or a burger, fries, and coke.
Food today:
B - a delightful long walk in the snow and sunshine (and a bit of blizzard)
L - creamy coffee, avocado, salad, radishes, mushrooms, cheese and ham 'sandwich' (buttered slices of cheese with ham and cucumber filling), celery with St Agur blue cream cheese dip, olive oil, mayonaise.
D - shakshuka (of sorts) - with leeks, kale, tomato, smoked paprika, corriander stalks, baked with eggs and topped with crumbled feta.