Westbury is a market town and civil parish in west Wiltshire, England. The town lies below the northwestern edge of Salisbury Plain, about south of Trowbridge and a similar distance north of Warminster. Westbury was known for the annual Hill Fair where many sheep were sold in the 18th and 19th centuries; later growth came from the town's position at the intersection of two railway lines. The busy A350, which connects the M4 motorway with the south coast, passes through the town. The urban area has expanded to include the village of Westbury Leigh and the hamlets of Chalford and Frogmore. History A Romano-British settlement was found at The Ham, in the north of the parish, in the 1870s. The manor of Westbury, and the hundred with the same boundaries, was held by the king at the time of the Domesday survey in 1086. The Wiltshire Victoria County History recounts the fragmentation into manors, and traces their ownership. The ancient parish included Bratton, Dilton, Dilton Marsh, Heywood and part of Chapmanslade. Churches at Bratton and Dilton were dependent chapels of Westbury church. Westbury centres on its historic marketplace – although markets ceased to be held in the middle of the 19th century – and the All Saints' Church. This was built between c. 1340 and 1380 in a transitional style between the Decorated and Perpendicular Gothic and parts survive, but the church was rebuilt in the 1430s, when a clerestory, three chapels, and most of the central tower were added; the north chapel was given by William de Westbury and his father. The west window was donated in the 19th century by Abraham Laverton. The Wilts, Somerset and Weymouth Railway was completed from near Chippenham, via Melksham and Trowbridge, as far as Westbury in 1848. That company was bought by the Great Western Railway in 1850, who over the next few years built lines onwards to Frome (to access the Somerset coalfield), then south to Yeovil and Weymouth, as well as southeast from Westbury to Warminster and then Salisbury. Westbury station was rebuilt in 1899 since it would become more important as a junction the next year, on the opening of the Stert and Westbury line. This was a faster route from London to Weymouth, which at Westbury crossed the route between the south coast and Bristol or South Wales. From 1906 the route from London was also used by