1837 and his replacement by Joseph Locke.

Locke assessed the progress of the construction works and estimated that around £1.7 million (£ million in ) would be required to complete the line. He dismissed many of the smaller contractors, awarding much of the remaining work to Thomas Brassey. He also instituted a more rigorous supervision system by his assistant engineers. On 30 June 1837, the London and South Western Railway Deviations Act 1837