Becks- had another cheapy idea, also GH-
Try & get hold of, a wooden veg crate, your Co-op may have some? OK slatted sides, but use some poystyrene sheet from packaging, around sides to provide some insulation & either bit of glass over the whole or some clear plastic sheet tied on!! Bingo a coldframe of sorts for transition from the little greenhouse. 
Shed refilled, boxes now in order for needing. Propagator in porch, compost bags down in shed. The 2 huge lidded plastic boxes, dirt cheap from Asda that OH says will not go back into our loft now donated to daughter to use!
Need to sort thru fabric scraps now, to see what's tippable, coz they're going up pronto. Byee, J.