To ask the Secretary of State for Transport, for what reasons electric-powered wheelchairs are restricted to a maximum speed of eight mph when being used on a road; and if he will make a statement; if he will amend the Use of Invalid Carriages on Highways Regulations 1988 to bring the maximum speed permitted thereunder into line with the maximum speed permitted for electric bicycles under The Motor Cycles, Etc (EC type approval) (Amendment) Regulations 2003 (S.I.1099/2003).