why is my pot grown broccoli growing bright red leaves

is it just the lower leaves? if yes it is because they have reached the end of their useful life. remove them and give them a light feed.

Thank you Seaburngirl.

Feed them with? tomato feed? Is it Ok to keep them in pots because what little soil i have is rubbish, just clay and stones?

well that is part of the problem, so plenty of water and probably tomorite or miracle grow type feed will be fine. I grow cabbages in big pots [5lt plus] and whilst not as good as them being in the ground they are ok.

Many thanks,