Jessops had a lot of their own brand items manufactured by Fotokemika at one time. As well as photographic paper, they had a range of B & W films in 120m & 35mm. Originally these were the R/KB 14, 17 & 21 emulsions, but later they used at least three other manufacturers for B & W 35mm films (someone in Spain, the old Ilford & Agfa) but they retained Fotokemika for the 120 roll films until they gave up their own branded films a few years back. They even carried the R21 in 127 but I can't remember if that was in their own packaging or in that of Efke. Their colour films were made by Agfa and possibly others.