Finally in 1895 the GWR directors announced that new lines were to be constructed to enable trains to reach Exeter, Plymouth and Penzance in a shorter time.
The route followed part of the Yeovil to Taunton Line – which was rebuilt with a second track and at a higher level to avoid flooding – from Athelney to Curry Rivel Junction near Langport East.
The prestige Cornish Riviera Express could now leave London Paddington station twenty minutes later yet arrive at Penzance at the same time as before.
Their drivers' knowledge in recent years has been maintained by running a summer Saturday service from Bristol to Paignton over this route.
Trains also served Athelney station and (from 1928) Lyng Halt on the old Yeovil branch, and Durston and Creech St Michael railway stations on the Bristol to Exeter Line, but fast trains avoided the middle two of these by using the new line from Athelney to Cogload.
This station was the first one west of Castle Cary when the line opened on 1 July 1905 and was situated a mile south east of Keinton Mandeville.
For the first year after opening on 1 July 1905, the station at Charlton Mackrell was the terminus of the temporary branch from Castle Cary.
It was situated in a cutting west of Somerton Tunnel near the hamlet of Upton but named after the larger villages of Long Sutton and Pitney, both about a mile distant south and north of the line respectively.