I ended up looking around for a few things that took my fancy and found they were just too expensive, but whilst on the Oldhammer Trading Community on facebook I came across this little gem for a really good price!
That's a mint copy of Games Workshops 1987 Rogue Trooper game, a game based in the Judge Dredd universe from before even some of my RT Marines were made.
Looking forward to playing this game, now I wonder if I can play it in my local GW ;)