found a multi standard modulator – I can relay both analogue audio and video to all these TVs (and possibly the street cable box if I got the correct point and a remaining spare analogue channel; although the baldy men might not like that)

https://www.youtube.com/watch?v=4B84YlMXt0A

https://www.youtube.com/watch?v=oR1kZx_rNCo

there is a more rational reason for this – the raspberry pi studio clock is low res and on the cheap “HDMI” telly I use works better on composite anyway; so may as well feed it through the modulator with VFR Europe as a soundtrack as a test feed.