Realtime trains loses sight of the service at Thingley and then picks it up again at Taunton. Not exactly reassuring.
RTT» does "know" where it went, but has chosen not to tell you - at least arguably. Off-route timing reports were available from
TRUST▸ :
07:50 Bradford Junction
07:57 Westbury
08:00 Fairwood Junction
08:03 Clink Road Junction
08:05 Blatchbridge Junction
08:08 East Somerset Junction (Witham)
08:14 Castle Cary
08:22 Somerton Ground Frame
08:28 Athelney Crossing
RTT has made the web design choice to present times against the current working timetable, which only has rows for timing points on the planned route. This makes the display more comprehensible, and is likely to satisfy the majority of users. It also avoids some difficulties in interpretation of off-route reports, though of course RTT still gets confused at times and can report impossible nonsense train itineraries.