I was on the Live Departure boards website earlier and was quite intrigued...
1951 Sunday ServiceIn the FGW train times book Swindon-Westbury section:Train starting from Southampton Central, to Swindon arriving 2020.
Who knows why they want cycle restrictions on a service at this time on a Sunday (pink dot).
On the Live Departure Boards:This train starts from Westbury at 1935, not Southampton Central. It continues to Cheltenham Spa (via Stroud Valley Line) arriving at 2130.
This train only starts from Southampton after 4th February - end of timetable, according to the train times book
No mention of the service continuing to Cheltenham
2144 Sunday ServiceIn the FGW train times book Swindon-Westbury section:Train starting from Southampton Central, to Swindon arriving 2227.
On the Live Departure Boards:This train starts from Westbury at 2125, not Southampton Central.
According to the train times book this train should start from Southampton Central on any Sunday which the timetable covers.

These are very bizarre. I don't understand why there are such differences between resources.
This service must also be error prone:

They have entered it twice into the LDB's.
The 1951 train tonight on Sunday 17th December (in picture above) I suspect departed about 1 minute late, however now shows as No Report on the LDB system.
Hardly any trains before the new timetable on the LDB at Melksham were marked as No Report, have they decided to turn off the monitoring point at Melksham so it looks like none of the trains run because most if not all are showing as No Report.

Also, wouldn't it be nice if the Melksham live departure board on a Monday at 1pm would look like this:

(Graham's 2-hourly service proposal)
As opposed to this, which is the current service:

(FGW timetable at December 2006)
