The information requested falls within the responsibility of the National Statistician, who has been asked to reply.
Letter from Karen Dunnel, National Statistician and Registrar General, to Baroness Miller dated 24 July 2007.
As National Statistician and Registrar General for England and Wales I have been asked to reply to your recent question asking how many families in the United Kingdom live in boats, caravans, camper vans, tepees, yurts, tree houses, benders, or other forms of unconventional accommodation.
We do not have counts for the individual groups requested as they are all collected and tabulated under the category “Caravan or other mobile or temporary structure”.
At the time of the 2001 census, the number of families in the UK that lived in “Caravan or other mobile or temporary structure” was 47,359.
Figure is at 2001 census day (29 April 2001) and a specially commissioned table C0384 has been run to create a UK figure.