One of SAVE's greatest successes - perhaps the most far reaching - was to persuade Michael Heseltine to restart the listing process in 1980. At that time many areas only had the most cursory survey, leaving numerous fine Victorian and industrial buildings and isolated sixteenth and seventeenth century farms and cottages unlisted. The resurvey accelerated through the 1980s (with the revisions called "green backs") and the number of listed buildings rose from 250,000 to nearly 450,000, though parts of the country were never resurveyed. The situation was complicated by the fact that even some of the resurveys were considered so weak they needed to be revised again. Thus were born the so called "blue backs". Nearly 140 have been published. However, there are over 340 lists for local authority areas in total and English Heritage and the Department for Culture, Media and Sport have now called a halt to traditional geographical resurveys, describing them as too "resource hungry", in order to concentrate instead on "thematic listing" of specific building types such as prisons, textile mills and twentieth century public housing. As a result many very significant towns and country areas remain with inadequate lists including Colchester, Leicester, Derby, Liverpool and, staggeringly, all but three of the London boroughs. One of these is Bromley, which was one of our original case studies back in 1979. Its list was last updated in 1973. How many buildings are being lost because it is considered too expensive to conduct listing resurveys? The danger is greatest in areas with large areas of twentieth century housing - such as Bromley - or nineteenth century civic and industrial development such as Liverpool. English Heritage must restart geographical resurveys.