[Ingajohn (OP)]

The detail is in the Subject heading. . I heard on the BBC breakfast show that he gets more emails about this than anything else.  I didn't  want to bother him personally!!

[KindredSpirit]

A similar clock is made by Alba wall-clock-horled-black-red-p-8075895. You will just have to search as I can’t put in an external link.

[UncleJamie2020]

It's made by Canford in the UK.

Seems like it's mainly for industrial and professional science research type work areas from the product description and price.

You get what you pay for I guess.

Web page:

https (colon) //www (dot) canford (dot) co (dot) uk/Products/58-5298_WHARTON-4900NEBU.05.R.S.UK-CLOCK-50mm-red-characters-EBU-SMPTE-LTC-in-surface-mount-UK-mains

Or web search terms:

Canford Wharton 4900NEBU 50mm red characters

I'm pretty sure that the above is the same size as Chris Smith's (pardon?) but you might want to check that with the supplier before buying one as other options are available.

For what it's worth this was pretty difficult for me to track down. The only reverse image service that found it was from the evil Russian search engine Yandex while the evil American search engine Google was completely useless. Now what does that say about the state of the World ay?

[UncleJamie2020]

Nearly forgot. There's also this app that will only run via Google Chrome on a PC.

I've no idea how to disable the white bar at the top when going full screen. It's probably only fixable by messing around in Windows' settings somewhere. Would appreciate a solution to this if any of you can figure it out.