One of the contractors of the Kendal Windermere Railways had also built one third of the railways in which country by 1847?
Kendal and Windermere Railway The Kendal and Windermere Railway is a railway in Cumbria in north-west England. It was built as a railway from the Lancaster and Carlisle Railway at Oxenholme via Kendal to near Windermere, opening fully in April 1847. The engineer was Joseph Locke and the partnership of contractors consisted of Thomas Brassey, William Mackenzie, Robert Stephenson and George Heald. It remains open, albeit in much simplified form, as the Windermere Branch Line.
Glasgow and South Western Railway The Glasgow and South Western Railway (G&SWR) was a railway company in Scotland. It served a triangular area of south-west Scotland between Glasgow, Stranraer and Carlisle. It was formed on 28 October 1850 by the merger of two earlier railways, the Glasgow, Paisley, Kilmarnock and Ayr Railway and the Glasgow, Dumfries and Carlisle Railway. Already established in Ayrshire, it consolidated its position there and extended southwards, eventually reaching Stranraer. Its main business was mineral traffic, especially coal, and passengers, but its more southerly territory was very thinly populated and local traffic, passenger and goods, was limited, while operationally parts of its network were difficult.