A walk's start, finish or meeting point description comes from the postcode lookup, and for postcodes without a civil parish, which covers most of Greater London, it collapsed to the borough and the police force area, giving labels such as "Bromley, Metropolitan Police". Descriptions are now built from the parish, or the ward where there is no parish, followed by the district, so the same postcode reads "Farnborough & Crofton, Bromley" and a rural one reads "Frittenden, Tunbridge Wells" rather than "Frittenden, Kent, Kent". Existing walks are tidied up by a one-off migration that looks each affected postcode up again and, if the lookup gives nothing, removes the police force area from the description it has.