I have certainly fed Rape to mine. It's grown commercially here and so some of it escapes. Turnip is OK to feed - it's on the RWAF safe list. Also looking at the wiki page for Brassica rapa, I see that one of its cultivars is one that I grow here (both for us and the rabbits, which is Komatsuna. My rabbits have this. I tend to give small quantities of most types of Brassica though because of the possibility of tummy problems (none evidenced) and also the issue of Oxalic Acid, which I don't fully understand
Pic No 1 is Green Alkanet, I think. Wow, I've never seen this growing in the wild
It's in Parsnipbun's book on foraging as being safe, so a treat for your rabbits.
Pic No 2 I think is Prickly Lettuce. This is one that I think you should check, as Parsnipbun says in her book that it can be confused with Teasel before it flowers.
Pic No 3, I think is Yarrow. Please check this though as the plant is not fully mature.
Pic No 4 I think is Hedge Bindweed, which is a favourite of my rabbits. Read what Parsnipbun says about the difference between Hedge and Field Bindweed though.
I am impressed by the variation of plants that you are finding. You must have some very good spots