I am not from the UK but the question didn’t seem country specific
As others already wrote, it’s individual.
Some people easily gets lost and possibly gain a lot of fat too until they finally are able to come back…
Others can go off all the time and it’s fine for them, I imagine, someone who only needs low-carb can get away with that.
I usually come back very easily, I do on/off keto all the time since ages (I never could lose that way though but that’s not the point here) BUT I feel significantly better (and eat way less. still a bit too much but way less) on very low-carb. So it’s my default woe for life for health, mood, energy reasons. I almost never actually plan a carbier day, it just happens. But I can get away with a single day (not high-carb, I prefer my normal food, just with some carbier extras here and there).
Weight changes are personal too. My weight is very stable, I am unable to gain fat quickly and I am still able to massively overeat (it’s VERY easy, actually). Genetics. I have no water weight changes anymore but I needed a few years for that I think (on/off keto and almost never below 30g net carbs a day, it probably would have been quicker on very low-carb all the time…? I don’t know how it works).
You can try to eat more carbs and see what happens but I wouldn’t add them just because it’s goal weight and I can (I don’t say you want to do that, I have no idea what happens in you. there are so many reasons to relax our ways, I know many of them very well). You probably changed (your taste and desires, I mean) and you probably will continue to change. I dropped many items during the years, I don’t need or want them anymore. But if you really want something… It’s up to you, I personally like experiments and don’t resist temptation but I do train myself if I realize something isn’t ideal for me and I can’t keep the amount low enough. For many of us (it’s partially true for me only, for a very few items), abstraining is the way and for many of us, tiny, infrequent amounts are just fine. And again, we can change A LOT. I don’t even like some of my biggest favs from the past, it’s a relief sometimes.
Some people actually works better with more carbs, sometimes or always or before exercise… others NEED very low-carb. My body strongly prefers it so it least it’s clear what I should do (most of the time, no one can restrict me that much, not even myself and forcing it wouldn’t be good). Many of us has this, it seems. More carbs is some luxury, fun or maybe, very rarely, necessity (if I really want to avoid carbs, I can in most circumstances), it’s fine sometimes but not it’s the ideal or default way of eating for the rest of our life.
I can’t possibly know if you really need more carbs or don’t but it’s fine and works better due to mental reasons or something.
So, not knowing you, I can give you the general advise that even if you add carbs, don’t do it with abandon. Keep your health conscious too (if you have that. ketoers often do). Not all carbs are the same, not all effect your body and mind the same…