Dare I mention 2M90 0615 Swindon-Southampton?
Oh, indeed you dare; there's an argument for adding Southampton into the "vestigial service" and perhaps even combining it with the Wesbury service there. But there's nothing back from Southampton. I know the list is woolly - as another example, there's a Bristol to Swindon service that runs, as I recall, just after the morning peak using a "West fleet" train which
could be considered to be the last local train via Bath and Chippenham.
Both of these are Gloucester turns. 2M90 starts from
GCR» at 05:19 and the 'local' to Swindon is in effect, an extension of the 07:11 from GCR to
BRI» (
BTM▸ ). GCR guards sign BRI to
SWI» via Box for this service, but also in case it is needed as a diversionary route.