Contents
GRT North
1968-1969
1969-1972
1972-1974
GRT1 North
1974-1975
1975-1981
1981-1985
1985-1991
1991-1997
GRT One North
1997-2002
GRT One Yernshire and Lamkinshire
2001-2002
2002
GRT One Yernshire
2002-2006
2006-2013
2013-present
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