Paddy,I worked for a company in the Delta metal group between 1975-83.I only paid into the pension scheme for a couple of years as I was serving my apprenticeship there.
If I remember correctly the firms scheme was run by trustees for Delta.When I started a private pension a few years later,again, if I remember correctly,they transferred my Delta contributions into my private scheme.
I have tried to track down what happened to Delta metals and all I can find is a piece on Grace's guide which states that they shut down or sold off most of their manufacturing sites.
Hope this helps.