Hi Dazzerelli,
Why not invest into some enviromesh? Just needs to be laid over the top of plants and weighed down with stones, bricks or pegs. Those hungry birds wont be able to get through that. Useful for many more pests in summer, root fly etc and provides some insulation in winter. Lasts years. For tallest plants like P.S.B and Kale use string pulled through mesh wrapped around stones on the ground to stop it blowing off. Bit like you would with guide ropes on a tent.
Robin