Postwar broadcast coverage was extended to Birmingham in 1949 with the opening of the Sutton Coldfield transmitting station, and by the mid-1950s most of the country was covered, transmitting a 405-line interlaced image on VHF.[original research?]

Answer this question, if possible (if impossible, reply "unanswerable"): The Coldfield Birmingham transmitting station helped cover what area in 1949?
unanswerable