The data on rodent infestation in domestic dwellings as revealed by the English House Condition Survey (EHCS) 2001 are broken down by region in the report “Rodent infestations in domestic properties in England, 2001”.
My Department does not have data on the rat population broken down by local authority. The EHCS data only provides an estimate of the proportion of dwellings with rat infestations inside or outside. It does not provide definitive data on numbers of rats.