Hi, one for me I think… 😉
1) Yes, that’s what it means
2) The fade does refer to the audio. The vision hold is so that they can extend the picture on the screen if, for example, they’re doing a voice trail to the next item and it goes over the running time of your programme, without ever going to a black screen. So, no you can’t fade the vision to black.
3) They’re not fussy about you using their ident clock as long as it conforms to their requirements and the information is clear (I can’t see a clock on their website at the moment – it has 30sec at the bottom, going clockwise round to 0sec at the top but cutting to black at -3sec on one side of the screen and space for you to type in the programme details on the other, I’ll post a link when I find one). I usually master at a facility, so I tend to use whatever clock the facility has on their server at the time.
4) They’re quite stringent on tech levels, so watch out for Black, White, Saturation and Gamut (if in any doubt play out through a legaliser, but try to avoid letting it clip anything substantial as that’ll affect the subjective 1 to 5 assessment). Sound levels are very strictly nothing over PPM6 (0 level/PPM4 is -18dbfs in the UK).
I usually have my sound mixed by a dubbing mixer (you can expect a professional sound suite to have PPMs) but when I mix myself I use PPMulator via Audio Hijack Pro on the Mac to see my levels and that hasn’t let me down yet.
A Harding PSE check is a very good thing to get done (speak to the facility of your choice about it and include the report when you deliver), but you can sometimes get away without one if there’s nothing obviously flashing in your programme.
In my experience they’re pretty hot on tech reviews but if you get a failure don’t panic, phone the tech manager and talk to them (their name and phone number will be on the rejection slip if that happens), they’re generally sympathetic if there’s a legitimate reason for something being less than ideal. They might decide to accept after all if it’s marginal (e.g., some poor quality archive or internet sourced material for which there isn’t a better quality version available) or they might tell you what you need to do. If you’re not technical it might be worth getting someone who is to make the call on your behalf – I’ve done that a few times for producers and production managers who aren’t particularly confident about that.
I’d say their attitude is generally “firm but fair”. TBH, Channel 4 and ITV can sometimes be more difficult than the BBC to deal with over technical stuff.