Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Lansalson branch line is a railway line built by the Great Western Railway to serve the china clay industry in the Trenance valley near St Austell in Cornwall, UK. The line was authorised by GWR in 1910 and after setbacks due to World War I the line opened in 1920. The southern end of the 2.5 km long branch line left the Cornish Main Line at Trenance Junction which lies 500 metres west of St Austell railway station. The line travelled north and passed Carlyon Farm kiln in the village of Trethowel, just north of this are the Bojea sidings.