Don't know what you modified Paul - doesn't matter - now I am a little dazed and confuzed?

Your profile says Wirral?
I am aware that UK analogue viewers have to put-up with 14:9 when there is a 16.9 programme on 'normal' telly. For a while BBC World here in Berlin (cable) was the same way. I remember them changing - but I cannot recall which way: i.e., 4:3 cut-out or letterbox 16:9??
Of course, in Germany, when there is a 16:9 presentation - it is presented in 16.9 - and they have done that for over a decade (probably harks back to those PAL+ days).
Maybe JTA has more to tell.