asked the Secretary of State for Transport what proportion of road accidents is caused by skidding.

My right hon. Friend regrets that information is not available in the precise form requested. Also, it is not possible separately to identify accidents caused by skidding and those in which skidding was a result of the accident. In 1975 10 per cent. of vehicles involved in accidents were reported to have skidded.

asked the Secretary of State for Transport how many deaths and serious injuries due to road traffic accidents have taken place between 1st March 1976 and 1st March 197.

My right hon. Friend regrets that no information on numbers of road accident casualties is yet available for 1977. For 1976 the provisional estimates are 6,520 deaths and 79,000 seriously injured casualties.