I worked in sales at Cosag, 1971/2. I served as asst mate on Bembridge and sailed on Max Reiman to recover buoyed off anchor we lost when it just off Gt Yarmouth. As sea experience to charter the vessels, I left bewore the Sperus. There was a small supply ship from? Bosher named ? Windrush or some such, if you can recall.
I also see Brian Wright, who was a master on another Cosag Vessel.
I hear poor John Lea is in Davey Jones locker, I heard. Mike Davenport I used to be in touch with some 30 years ago, but nothing since.
Hope this helps.