Context: 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?]

Question: What city received BBC signals starting in 1949?
Answer: Birmingham

Question: Which facility brought the BBC's transmissions to Birmingham?
Answer: Sutton Coldfield transmitting station

Question: What kind of image was broadcasted by the BBC by the mid-'50s?
Answer: 405-line interlaced image

Question: On what frequency band was the BBC broadcasting in thie 1950s?
Answer: VHF

Question: What year was broadcast coverage extended to Sutton?
Answer: Unanswerable

Question: The Coldfield Birmingham transmitting station helped cover what area in 1949?
Answer: Unanswerable

Question: What did postwar coverage consist of?
Answer: Unanswerable