Suppliers of photographic chemicals, printing equipment and consumables; A W Penrose & Co acquired by Hunter & Co in 1927 to became Hunter Penrose; early 1960s purchased competitors S R Littlejohn to become Hunter Penrose Littlejohn; later in the 1960s merged with Johnsons of Hendon, producer of photographic chemicals, to become the Johnsons HPL Group; during the 1970s the company changed ownership twice, before a mangement buyout in 1983.