Valenta engines were also used in the offshore oil industry - a colleague had to obtain parts for one on a large platform north of Shetland and unipart rail (I think) were able to supply the relevant spares, but definitely getting long in the tooth by then. They were often used for driving pumps due to their relatively high speeds. Also cheaper to run than RB211s...Valentas weren't just used in HSTs. 8 of them were also used as auxiliary power generators on board Invincible, Ark Royal and Illustrious and on some submarines. Hence why Devonport also serviced the engines for BR. As Illustrious has only recently been decommissioned there may well still be valentas available there.