Possible Clues:

• Big Ben is on it
• River under London Bridge, once
• After tea there may be the traces of a horse in them in london
• Most bits of the river go over the carthouse
• What a shame to go through London after tes!
• The father of London gets set up around the pork
• London flood control
• Set up around the pork through London
• Set up about the pork through London
• What a shame it could be flowing after tea!