Solari...? Do you mean the big mechanical departure board?
TBH, as much as I like the old thing, it isn't as reliable or as flexible as an LED board. I notice that one column was recently taken out of use after it jammed rather than being repaired, so I guessed that it's days were numbered.
Yes, the big blue giant flappy things will depart Liverpool Street at the end of this year, leaving Charing Cross as the only station (that I know of - please correct me if I'm wrong) that uses them.
That does tend to be one of the main problems with the boards - the flexibility, but I notice that the boards at Liverpool Street have only 1 station in each flap unlike that at Charing Cross and the ones that were removed from Victoria in November 2004 where there could be up to 5 stations on a flap.
I also remember reading somewhere that if there was a significant timetable change then a lot of work was needed to update the system (I'm not sure how the boards work in that sense but there was mention of cards with holes cut in them!).
Oh please!!! We've got some proper mumblers doing the PA at LST at the moment and, while I wouldn't like to think that anyone is going to get the "old heave-ho" as a result, it can only improve matters. I'm not sure if it will be Phil Sayer or whichever chap they used to record the on-train announcements for PIDS fitted stock. I would like to think that they'll use the one chap there who seems capable of making consistently good quality announcements to ensure that a degree of continuity is ensured.
As for the return of the 'one' to announcements, I think it may come back. It's certainly used on the Cl317 PIDS system, but the phrasing of the announcements has been improved. Then again, given that c2c currently only run two train each day into LST perhaps the powers-that-be will decide that it is no longer necessary.
It may not have been the brightest choice of names, but then punters generally aren't the brightest of sparks at the best of times anyway. Not long back I had to deal with a confused lady who was adamant that the StanEx service I'd just brought into P6 was her train for Ilford, all because the timetable for the Shenfield Metro services has the number 6 printed on the front cover.
Judging by the phrasing on the poster it said it will 'compliment' the manual announcements whatever that means - I remember when the old system was removed at Luton and in the 10 months that there was no system every announcement was done manually until Phil Sayer arrived and it was like the new toy - every announcement in the system was being played every 5 minutes!
With regard to 'one' as their full name is 'one railway' it could be possible that this is used to avoid as much ambiguity about the time as possible and leaving a longer pause in between the time and 'one' might help like:
'Platform 8 for the 10.20 [PAUSE] 'one railway' service to Norwich'.
About the fact that c2c only have two trains a day into Liverpool Street - the announcements at Waterloo always include SWT in them despite being the only operator, but the system at Waterloo East never mentions whether the service is operated by Southern or Southeastern - which I think must be how they're set up.
with an LED type like that used at Victoria and now installed at Waterloo. 
