I did a bit of investiagation and you lucky lot in Bristol get:
Hourly Southampton (maybe not from Soton but hourly from westbury (once again didn't look)) > Gloucester and perhaps beyond (didn't bother looking)
Normal Cardiff > Ports
Two hourly Taunton > Cardiff
From what I can see from the online journey planner it looks like hourly from Westbury to Glos with some services originating from Weymouth. Westbury-Southampton shuttles have gone which is not good news for capacity on Cardiff-Pompey services. These appear to be replaced by services running between Westbury-Warminster to serve Dilton Marsh (Why not run these to Salisbury to connect with
SWTs▸ new Salisbury-Southampton service??? To much like common sense and not enough rolling stock!) Whether these services start from elsewhere its difficult to tell. Annoying that it doesnt look like
FGW▸ are going to publish the draft timetable online as previously mentioned. This would have passed the draft stage if its now on the
OJP▸ .