It is probably a silly question, but.
I use a 5 bed rotation system; Potatoes / Peas & Beans / Brassicas / Carrots, Parsnips, Shallots & Garlic / Other stuff.
Needless to say the Sprouts prevented preparing all the bed from being prepared for this years crop. Given that the Shallots and Garlic will be lifted June(ish) depending on the weather; could I plant the Sprouts in that space. Then when they are lifted I could plant later growing Brassicas in their place? I do not suffer from club root on the plot. (should I say yet?)
As I said it is probably a silly question, just a mad idea I came up with.