This is Gog in the Royal Arcade, one of the two 7-feet giants who have been striking the time on Gaunt's clock since 1842. They were carved from clear pine and modeled on the figures erected in Guildhall, London, in 1708 to symbolize the conflict between the ancient Britons and the Trojan invaders.
Mythology tells of the giants Gog and Magog (also known as Corineus and Gogmagog) having been captured in battle by the Trojans and made to serve as porters at the gateway of an ancient palace on a site later occupied by the Guildhall. It is traditional for Gog to stand to the north and Magog to the south. Took an earlier image 6 years ago http://www.pbase.com/bernard74/image/59701410