It came in with the newest catalogue in the post today
Good find. I couldn't find that anywhere, and still can't, but can confirm it works.
or you can just use free delivery code: SP17R1 :)
Not working for me. Says "Discount code ‘PLOTSP17’ has been applied to your order. If it doesn't look as though the code has been applied, please check that you have met the conditions to qualify." but does not subtract anything. **Found out why. Only works for non sale items.