You'll never look back Offwego
One of the best investments we have made at the plot are our tunnels tbh, other than the plots themselves of course
Lots of things we grow over the Winter are module-sown in July ready to plant out as soon as there is space: Perpetual Spinach, Mustard Greens, Tatsoi, Spring Onions, Lettuce, Parsley, Beetroot, overwintering Dwarf Peas, Mooli, Broad Beans for example
Hope that helps!!