Found 8th Jan 2018
Amazon states £24 full price. I had the usual £6 off voucher in the voucher section but when I got to checkout it shows promotions applied -£13.20 for 5% subscribe and save so maybe more discount if you subscribe to more than 5 items. Voucher does not work unless you subscribe and save which you can cancel later. First time putting a deal on so hopefully I have done it right.