This 6:44 6:47 business is beyond a joke now. Everyone travelling from Melksham to Trowbridge wants that train....
Not quite everyone ... some of us want a more reliable connection at Westbury into the 07:01 Paddington train - that's not "guaranteed", but it is already within the 5 minutes to make it an official connection. Sometime it makes it, sometimes it doesn't ... and if it doesn't the next train out for Paddington is "change at Swindon" - the 07:04. Via Melksham again. But your desires and mine are the same here, and I would love to see the 06:38 from Melksham leaving at 06:30, 06:39 at Trowbridge and 06:48 into Westbury. Carrying on - as at present - at 07:01.
However ...
* Platform availability at Westbury -
NOT a problem; previous service leaves at 06:40
* Others on the train from Trowbridge -
ouch; there are a few who join for Salisbury, and they won't like the alteration
* Others on the train from Swindon - very few indeed /
not a problem* Earlier path from Swindon (at 06:05) - probably
not a problem* Being available to leave Swindon at 06:05 ...
ouch; it only arrives there at 06:06 and has to reverse
* Earlier path into Swindon? ... this is the 05:19 off Gloucester and makes a connection into the Paddington train at 06:11 -
ouch as to run it earlier would increase journey times for Stroud Valley to london commuters.
* You ask for it to make a connection *sometimes* at least. Alas, human nature being what it is, people will the want it to always connect, so -
ouch - a couple of minutes change would lead to more people trying to make the connection and have it fail, and more frustration with
FGW▸ rather than less.
I even looked around and thought about moving the 06:44 few minutes later - and found another can of worms.
The real solution to your too-long day is a radical one - extra services from Westbury to Swindon at 07:34, 09:34, 11:34, 14:34, 16:34, 18:34 and 21:34 returning at 08:44, 10:44, 12:44, 15:44, 17:44, 20:14 and 22:44. It would give you a commuter-time connection into Bristol from Chippenham, and / or a return train an hour earlier, giving you the choice of reducing your working day at either or both ends. And it works for others too ... proper Swindon commutes with arrivals there at 07:48 and 08:18 in the morning peak, departures back in the afternoon / evening at 17:44 and 18:44, with 2 later trains at 90 minute intervals for people who have to work late. It's a single unit with 75% utilisation during most of the day, and it fits snugly between the
HSTs▸ on the Bristol and South Wales runs. The exiting morning TransWilts service still starts the day, and the existing evening one fits into the pattern. From 5 p.m. trains are off Swindon with intervals of 60, 90 and 150 minutes - an ideal gradual reduction for later passengers.