Clarbeston Road and Letterston Railway

In 1848, the effects of the Great Irish Famine made Ireland a less attractive proposition, and work on the western end of the line stopped as a result.

[2] In 1851, work restarted, but it was decided that the western terminus should be on the Milford Haven Waterway, and Neyland was selected; the section between Clarbeston Road and Fishguard, some 14 miles (23 km) in length, was not built.

[5] In 1899, the F&RR&H sold its railways in Wales to the GWR, which completed the extension of the NP&FR line to Fishguard and Goodwick on 1 July 1899.

[6] A new double-track line was proposed by the GWR to shorten the distance to Fishguard; this was the Clarbeston Road and Letterston Railway, which opened on 30 August 1906 between Clarbeston Junction (271 miles 8 chains (436.3 km) from Paddington) and Letterston Junction (281 miles 58 chains (453.4 km)).

Falling traffic on the line caused it to be reduced to single-track on 16 May 1971 with a passing loop at Letterston Junction.