Many thanks for the explanation, most helpful and understood.

The real benefit for me would be trains from Swindon, via Melksham, continuing via Warminster and not starting/terminating at Westbury. As I currently catch the 07:04 from Westbury and the 17:36 from Swindon. The changeovers at Westbury to get from and to Warminster are quite long for these trains resulting in my driving to Westbury and paying parking which add to my commute. Hopefully this will change soon?

Thanks for this post grahame and for adding me to this forum and board.

While a 16:48 departure from Swindon would be great, only going as far as Melksham would make it redundant for many people who would depart it at Trowbridge and Westbury (including myself who lives in Warminster).  A large percentage of those people that catch the 17:36 from Swindon travel all the way through to Trowbridge and Westbury, as you know.  A lot of these users would also wish for and benefit from an earlier train than the 17:36.  Is there anyway that the timing of the 17:36 can be brought forward earlier, rather than putting in an additional train at 16:48, as the 18:48 follows closely after the 17:36 in comparison to other time gaps.