Sort these into order, smallest first:
a) The length of the UK motorway network, in miles
b) The length of the UK railway network, in miles
c) The population of Sheerness-on-Sea
d) The length of the Severn Tunnel, in feet
b) Length of UK railway network
a) Length of UK motorway network
c) Population of Sheerness-on-Sea including chavs
d) Length of Severn Tunnel