Its status was downgraded to an A-road in 2000 when responsibility for trunk roads in Greater London was transferred from the Highways Agency to the Greater London Authority. Approximately halfway along the road's length a new junction was built to serve the Westfield London shopping development.
In 2000, the road's classification was changed to an A-road as responsibility for major routes in Greater London shifted from the Highways Agency to the Greater London Authority. Near the midpoint of its course, a new intersection was created to support the Westfield London mall.