Sonning Cutting is on the original Great Western Railway built by Isambard Kingdom Brunel.[1] It is to the east of Reading station and to the west of Twyford station near the village of Sonning in Berkshire, England. Originally planned to route around the north of Sonning Hill past the village, the railway instead bypasses the village due to local objections. The resulting route follows a cutting over 1-mile (1.6 km) and up to 60 feet (18 m) deep, through the hill, giving a more direct route between Twyford and Reading.[2]
The cutting was hand-dug without machinery and the spoil removed in wheelbarrows and horse-drawn carts. It took two years to complete and there were several casualties in the process. The line was opened on 30 March 1840.
After the ending of the broad gauge in 1892, the railway was widened to four tracks. This involved a major rebuilding of the cutting, during which the slope of the sides was reduced.