According to Wiki, "During the Great Frost of 1683–84, the worst frost recorded in England, the Thames was completely frozen for two months, with the ice reaching a thickness of 11 inches (28 cm) in London. Solid ice was reported extending for miles off the coasts of the southern North Sea."
At the frost fairs, there would be entertainment, fairground rides, puppet shows, plays and fires would even burn on the ice.
|film still (Anonymous 2011) shows London Bridge and the ice. Image from Daily Mail site.|
|images from wikipedia|
Some other images of the Thames frozen:
|1963 - Thames at Windsor from Thames site|
|the Thames in the 50's from here|