My hon. Friend will be pleased to hear that that report of good progress will be well received in Swindon and elsewhere along the length of the M4. He will be aware of the fact that seven of my constituents were killed in an horrendous accident on the M4 in the spring of this year. In that context, what can be done to improve road safety on the M4, especially in relation to fog warning signals, motorway lighting and central reservation barriers, which have proved ineffective in preventing cross-over accidents?