I agree just know it's a good offer I https://www.decoratingwarehouse.co.uk/johnstones-perfect-matt
Dulux trade range is actually pretty poor,it shines and struggles to touch up successfully, dark colours really pretty bad banding cutting in shows, terrible finish. Tikkurlia colour matt is a far better choice, lot cheaper too. Johnstone Trade Matt fairly decent also.
This gear is a bit different, it can technically be touched up after other trades etc and not show. I had bit hassle with the coverage in colours, kind of put me off. However, Johnstones Trade Vinyl Matt emulsion is pretty good paint for most uses. A similar cheap and better product is Tikkurlia Anti Reflex 2, which is a dead flat finish at around £30/£35 Inc Vat. Tikkurlia have Decor centres around the UK major cities, also several independent decorators chains sell it, Brombrough Paints do it the North West.
No manufacturers Matt emulsion paint is worth £118, even if it is 10 LTRs !!