Question to the Department for Transport:
To ask the Secretary of State for Transport, what estimate he has made of the average speed of vehicles travelling between junctions 4 and 3 on the M25 on weekdays between 4pm to 7pm in August (a) 2008, (b) 2012 and (c) 2016.
The information is not held centrally for the breakdowns requested and could only be provided at disproportionate cost.