Link 1: UK Christmas TV - HOME

BBC: 1936 - 2013
ITV: 1955 - 2013
Channel 4: 1982 - 2013
Channel 5: 2000 - 2013

Also:

Link 2: CHRISTMAS RADIO TIMES COVERS 1936-1968 - UK Christmas TV

Link 3: CHRISTMAS RADIO TIMES COVERS FROM 1969 - UK Christmas TV

Link 4: DOCTOR WHO AT CHRISTMAS - UK Christmas TV