Here are the latest answers from First Great Western :

"I am sorry that you have experienced delays caused by cancellations on the Cheltenham Spa to Westbury and the Melksham to Swindon services.

I have included the reasons for the cancellations below as requested:

23 December 1946 Cheltenham Spa to Westbury, no train conductor available.

22 December 1950 Melksham to Swindon, no DMU engine unit available.

20 December 1950 Melksham to Swindon, no experienced driver to operate route.

The 0717 Melksham to Swindon service you also refer to in your email was cancelled on 18 December 2006 because of problems with the depot and was short formed (but on time) on 21 December because of unit shortage, however it did run to time on 19 and 20 December.

There are a number of reasons for cancelling train services and it would appear that you have experienced an unusually high level of disruption as a result of the cancellations. I am sorry if you have found travel with us difficult, I hope that your future journeys with us are more reliable."

Its going to get busier for the Customer Services Team :

17:06 Westbury to Southampton Central due 18:17

This train has been cancelled. This is due to a member of train crew being unavailable.

15:39 Southampton Central to Westbury due 16:45

This train has been cancelled. This is due to a member of train crew being unavailable

14:12 Westbury to Southampton Central due 15:23

This train has been cancelled. This is due to a member of train crew being unavailable

15:22 Portsmouth Harbour to Cardiff Central due 18:39

This train has been revised. It will additionally call at: Dean, Dunbridge and Dilton Marsh

13:30 Cardiff Central to Portsmouth Harbour due 16:49

This train has been revised. It will additionally call at: Dilton Marsh, Dean and Dunbridge.

16:30 Cardiff Central to Portsmouth Harbour due 19:49

This train has been revised. It will additionally call at: Dilton Marsh, Dean and Dunbridge.

18:48 Southampton Central to Westbury due 19:48

This train has been cancelled.

18:22 Portsmouth Harbour to Cardiff Central due 21:44

This train has been revised. It will additionally call at: Dilton Marsh, Dean and Dunbridge.