On Sun, 07 Feb 2021 18:21:33 GMT, JohnP wrote:

A couple of things intrugue me about TV production:

[snip]

2. When cutting from one scene (in a drama) do they often cut to the new
sound - ahead of the picture? I suppose it is for some artistic reason -
but I can't appreciate it.

It's a video/film editing technique called a "J cut". See he
https://en.wikipedia.org/wiki/J_cut