Well, I did stumbled on this:
https://www.youtube.com/watch?v=32yYfTVIzBE
"Mullard" was owned by "Philips" since the '30's and they probably invested in creatinf the C.R.T. plant, but crafstpeople where still need then (and I think lately in the C.R.T. era). The production seems to be as far as automated as the times permited.
One thing that I noticed is that they are rectangular C.R.T.'s, not round ones. Did "Philips" was one of the 1st to introduce in mass production such tubes, because as far as I known some U.S.A. tv sets had still round (conic) C.R.T.'s in 1950-1952