If there was a station on the main line at Gloucester, GWR or their successor would look for an excuse to stop their London trains there instead of going into Central and reversing. This might not be good for the city centre.
Thank you for raising this very important point.
If a new Gloucester station on the main Bristol to Birmingham line is ever to be approved, then not only will it need a robust business case but it will also need the backing of the City Council. This may be problematic.
I may be wrong but from what I have read I get the impression that the City Council are not keen on a Gloucester Parkway as they think it would undermine the existing City station which they regard as a key strategic asset. Although I understand their position – it is after all the Council’s job to do all they can to support Gloucester City – I think this view can be challenged.
Gloucester City Station has a supposedly much vaunted location adjacent to the city centre that provides access to a restricted range of train services and in 2016/17 chalked up around 1.5 million entries and exits. In contrast Cheltenham Spa station, located in a relatively quiet leafy suburb and a good 15-minute walk from the town centre but providing access to all rail services running through the region, chalked up just under 2.4 million entries and exits. The lesson here is that quality of train service appears to be a much bigger factor in determining how busy a station will be than that stations precise location.
Concerning Gloucester, if it is necessary for passengers using the current city centre station to resort to car, taxi or bus to travel between the station and their origin / destination in Gloucester, then for many people (perhaps even the majority) a Parkway station with ample parking and avoiding the congested low capacity city centre roads would almost certainly be more convenient. If Gloucester City station does have any strategic advantage, then it is solely down to being within walking distance of key destinations in the city. The really key question is how many organisations are there whose prosperity really depends on being within easy walking distance of the current city station?
Overall, Gloucester has a vibrant economy but a great deal of activity takes place in business parks on its eastern flanks. There is a wide mix of both engineering and service companies and a Parkway station would serve this market very well. It would also better serve the needs of the many Gloucester residents who live in the surrounding residential areas and who commute daily to Bristol and Birmingham and others who visit London regularly.
So addressing
edwin_m’s very legitimate concern that a Parkway station “might not be good for the city centre”, in most cases I would agree that a city centre station would trump a parkway. However, and it would need some proper research to fully confirm this -
given the specific railway geography of Gloucester - I doubt that a new Parkway station (that would be additional to the existing city centre station) would be detrimental to the city centre at all. Rather I think that it would prove to be a great success and the much improved connectivity and capacity it would provide would be highly beneficial to the whole of the city region including the city centre.