I see from Live Departures board the train ius canceeled again ( but lools as if it is running different route).

STATION TIMETABLE EXPECTED ACTUAL
Gloucester Dep05:29 _ 05:32
Stonehouse Dep05:42 Cancelled _
Stroud Dep05:47 Cancelled _
Kemble Dep06:01 Cancelled _
Swindon Dep06:18 Cancelled _
Chippenham Dep06:34 Cancelled _
Melksham (Your station) Arr06:43 Cancelled _ Dep06:43 Cancelled _
Trowbridge Arr06:53 06:55 _  ( see it arrives at 6.55 looks like no stop from Glouscrster)
Westbury Arr07:01 On time _
Dilton Marsh Arr07:08 On time _
Warminster Arr07:15 On time _
Salisbury Arr07:36 07:34 _
Romsey Arr07:56 On time _
Southampton Central Arr08:09 08:06 _