Bandersnatch:
Is fruit allowed after the first fortnight of bootcamp?
Yes, but only berries have a look at the tabs at the bottom of the spreadsheet for Bootcamp Light rules, and you will see the fruits listed that you can have there
Is there a list of suggested recipes anywhere?
Indeed there is! Here it is
Can you eat things like porridge oats and lentils, or are they banned?
Not on Bootcamp. However, once the ten weeks are finished/you have lost the weight you want to, this is the point at which you start to maintain. Here, the idea is to gradually add back in more carby foods, keeping a firm eye on the daily carb levels, until the weight starts to go back on.
Do you find that once you stop low-carbing, the weight piles back on again? I'm up for trying to make permanent changes to my lifestyle (eating more healthily, in smaller portions, and not eating between meals) but don't want to ban any foods from my diet long-term. Is that likely to be a problem?
It depends! If you just revert back to eating lots of bread/pasta/potatoes/fruit/chocolate, etc - then yes, the weight probably will pile on - it's why you put weight on in the first place. However, if you follow the rules of maintenance as outlined above, then you will be able to work out what you can tolerate and what you can't. The reality is that you will be able to eat anything you want to, just not all the time!