The Museum of London
Diamond Geezer has a full report), it's really worth a visit, I will bring you more pictures and stories soon. The story goes that back in the 18th century, when this elaborate coach was made, they harnessed up fine horses to pull it, who strained too do so. The Lord Mayor of the time was the owner of Whitbread's Brewery, and said something like "Those fancy things will never pull that - I've got just the thing you need" and loaned his dray shire horses to pull the carriage, which they do to this day. When you see it close up, you realise just how massive it is.