The CDRC Distance of Residential Moves (DoRM) Index data are compiled from CDRC’s Linked Consumer Registers secure data, which contain annual updates of the names and addresses of adults in the UK from 1997 onwards. This Index provides yearly Lower layer Super Output Area (LSOA) estimates of the median straight-line distances of all known residential moves to, from, and within each LSOA in the UK.

The Index allows researchers to explore locality-scale changes in residential mobility and migration patterns over an extended period. Mean annual LSOA residential move data are provided for adult individuals moving out of, moving into, or moving within a UK LSOA. Estimates are triangulated with census estimates and can be used to update them during intercensal periods. Some LSOA boundaries have changed since 1997, so the boundaries of 2011 Census LSOAs were used to harmonise results.