The right hon. Gentleman has a point to make. As he knows, we are consulting on our post-2010 road safety strategy, and we know that 20 mph limits are popular in many areas. They are a relatively new phenomenon and we are gathering evidence on the success that has clearly resulted from the introduction of 20 mph limits or zones. He also has a point in that those local authorities that have tried variable speed limits ought to be able to supply us with data so that we can incorporate them into the consultation, because we intend to issue new, stronger guidance both on 20 mph limits and, for local authorities where there is a 60 mph limit, on dangerous rural single carriageways. It is appropriate to have them revisit the issue, and variable speed limits, looking after the motorist and promoting safety, may very well be another way forward.