It is part of Mike Sharpe’s Space Wolves army, which was on show at GamesDay 2006.
It is a Forgeworld model, the Citadel Venerable Dreadnought is awful as it basically consists of the plastic kit (which is nice) and then cover it in metal parts. It just looks like they are stuck on (which they are), whereas the Forgeworld model looks more “real” in comparison.