This pic suggests the lorry was turning left from Tower Bridge Road into the western arm of Queen Elizabeth Street http://t.co/gNnDO1cfxa
This is a legal turn but very tight and only used by buses, people who are lost and as the escape route for lorries avoiding the 18 ton weight limit on Tower Bridge. http://is.gd/YK0nyl
Other picture on twitter shows a 3-axle 24-26 ton lorry
Thanks for clarification