As far as I understand the situation, the ILFORD facility was built in the early 1980s when there was much more use of black & white photographic materials for commercial and industrial purposes (e.g. newspapers and HP5). I suspect one key to the success of ILFORD Photo has been a coating line than can cope with defined runs of a particular product, and then be cleaned and changed over to coat for a different product. In comparison to Kodak building machines that are capable of coating Tri-X continuously for example.

Tom