F ▁Band ▁III . ▁ ▁This ▁was ▁the ▁sole ▁system ▁in ▁existence ▁until ▁the ▁prepar ations ▁for ▁the ▁introduction ▁of ▁ 6 2 5 - line ▁transmission ▁in ▁ 1 9 6 4 ▁and ▁was ▁put ▁out ▁of ▁use ▁at ▁the ▁start ▁of ▁ 1 9 8 5 . ▁▁ 6 2 5 ▁line ▁system ▁▁ 1 9 6 4 ▁saw ▁the ▁launch ▁of ▁a ▁third ▁television ▁service , ▁known ▁as ▁BBC 2 , ▁and ▁with ▁it ▁the ▁introduction ▁of ▁the ▁ 6 2 5 ▁line ▁service ▁on ▁U H F ▁B ands ▁IV ▁and ▁V . ▁Wh ilst ▁the ▁extra ▁lines ▁theoret ically ▁offered ▁better ▁resolution ▁and ▁picture ▁clar ity , ▁the ▁fled g ling ▁network ▁of ▁new ▁transmit ters ▁required ▁to ▁provide ▁the ▁service ▁offered ▁far ▁inferior ▁coverage ▁compared ▁with ▁the ▁existing ▁V H F ▁services ▁and ▁was ▁pr one ▁to ▁increased ▁inter ference ▁often ▁resulting ▁in ▁poor ▁picture ▁quality . ▁Furthermore , ▁few ▁people ▁had ▁the ▁new ▁sets ▁required ▁to ▁receive ▁the ▁new ▁service ▁or ▁the ▁different ▁type ▁of ▁aer ial ▁required ▁to ▁pick ▁up ▁the ▁U H F ▁signal . ▁ ▁Col our ▁ ▁During ▁the ▁late ▁ 1 9 5 0 s , ▁when ▁the ▁decision ▁to ▁introduce ▁colour ▁television ▁was ▁first ▁seriously ▁mo oted , ▁the ▁then ▁two ▁main ▁systems ▁for ▁consideration ▁were ▁the ▁French ▁SE C AM ▁and ▁American ▁N T SC ▁systems , ▁the ▁latter ▁generally ▁considered ▁superior ▁and ▁expected ▁to ▁be ▁adopted . ▁Through out ▁the ▁ 1 9 6 0 s ▁a ▁third