[Stooky Bill]

They do, but presumably it'll just be clean graphics but not clean recorded sections (VTs in old terminology) Having two different graphics outputs is a lot easier than editing and playing dual versions of every clip (it's what BBC News has done for years) .

In recent years the BBC gallery have run their own credits and not taken the ones from the main production. Not only does this enable them to omit the massive lost of company names but also add their own production staff doing the domestic output

Im fairly sure your mistaken and they manually cover up the graphics during the live show.

EDIT: As far as Im aware theres only 2 versions of the show, one with all the sponsors and blanks in the graphics to put telephone numbers in and another one called RoW (Rest of the World) which has slightly more sponsorship and the app link rather than telephone numbers.

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In the credits of SF1 you actually could see them leaving a little bit of a gap after the first slide so the UK gallery had time to insert the cover up.

They do this with the sponsor logo on the tranisitions too, So it will require the BBC using the Jury Show rehearsals to note down the times, or they are provided by EBU and being very quick on the mixer to put in the blank covers.

I'm not mistaken - the EBU is providing a 'non-commercial' feed of the shows, known by the EBU as the clean. Though how this differs from the main I don't know (I'll try and watch then for comparison later in the week).

There are several feeds of the Main for resilience so the BBC production team have them available as outside sources too so they still have to be ready to blank that if need be. Yes they have the rehearsals to know where the sponsorship bits will be. The voting graphics were played out on Monday so that every broadcaster could line up their telephone number graphics 

As you say there's also the Rest of the World feed. As far as I know this and the clean are sent out as unilaterals just to those who need them, but the main feeds are fed out via satellite as multilaterals to every member

Note - this is the case this year, whether theres been a commercial free version in other years I don't know.