Timings in the Bristol area are:
CHIPENHAM PASS 11:37
BATH SPA 11:51 11:54
NSOMERSTJ PASS 12:06
BRISTOLTM 12:09 12:12
WORLE JN PASS 12:27
BRIDGWATR PASS 12:38
TAUNTON 18:15 18:18
BRIDGWATR PASS 18:28
WORLE JN PASS 18:40
BRISTOLTM 19:06 19:26
BATH SPA 19:39 19:42
CHIPENHAM PASS 19:54
Info taken from the Rail Gen Yahoo group.