Agreed @THX1138UK, the Network Blu-rays are superb. I just wish they could get their hands on "Thunderbirds."We're lucky that Gerry Anderson ran an independent company and chose to film all of his most influential serials on high-grade 35" film. If he had worked directly for the BBC or one of the ITV companies, then he would probably have used 16mm film and/or video.
I'm sure his connections with ITC and Lew Grade (who also ran the ATV franchise) were influential in the 35" film choice. Lew Grade understood the American market and knew things had to look good to sell.
The 'Space 1999' Blu-rays box-sets released by 'Network' a few years ago look absolutely superb (and these are in the correct 4:3 aspect ratio).