p.s. Malamute - "but I remember the excitement at seeing all that was on offer there",- I know exactly what you mean! It was Dungeons and Dragons that led me to Hammersmith, and i am sure all that had a negative influence on my school grades. My head was always in another world.
Likewise, the thrill of entering the hallowed 1 Dalling Road clutching a long saved five pound note (and you came out with a handful of figures for that). D and D certainly mucked up my O levels, but I still have no regrets
I don't remember seeing this Grond at Hammersmith (I think it is part of Joe Dever's collection), but may have missed it.
Looking at grond again that head on the battering ram looks like my jack russel Squigley.
I reckon that was the head off the Action Man Alsatian dog.