Brocolli, Cabbages, Tomatoes and Peppers

My Broccoli seems to have grown well this year, but not many plants have actually produced any Broccoli, and those that have haven’t got very much.  I planted them out in July, and I think I have kept them fairly well watered despite the dry weather, I haven’t fed them.  Any idea why they haven’t grown much Broccoli?

My Cabbages have been a bit big for my netting for a couple of weeks now.  Will this have halted their growth permanently or it is worth making a bigger netting (I won’t get a chance until the weekend).

On the tomatoes and peppers.  Have people brought theirs in now?  I would like my peppers to ripen up a bit, as I prefer them red to green, but should I just bring them in, to make sure they aren’t spoilt by the first frost?  My tomatoes are still green, my fault I out them in far too late, but I was intending to make green tomato chutney with them.  Should I bring them in as well as the peppers above?  Also I am sure some of the tomatoes are definitely fully developed, as they are so big.  Would it be a problem if I put under developed ones in my chutney.  F it is, how do I tell, apart from size if they are fully developed.

Sorry for lots of questions on one post, but thought it might be better than lots of posts.