Here we take a look underneath GWR 4073 'Caerphilly Castle', the first of the Great Western Castle Classes. This was filmed on 18/08/2017 at 'Steam' inside the old Great Western works in Swindon, I highly recommend visiting there if you're ever in the area.
Hope you enjoy, this isn't the best quality video ever, but at least you can see what it is really like underneath a Castle.
