I am driving to Sidcup and Woolwich most days and Lewisham, Bexley and Greenwich have introduced 20mph zones but not consistently so it is difficult to remember what speed you should be driving at. Last night when I drove back down LL I had someone on my tail who decided to overtake at high speed and nearly smashed into oncoming traffic. If slower speeds will cut accidents I am all for them but they need to be consistent and enforced.