Posted: 14/09/2014 at 11:43
I recall a company called 'British Insulated Callender's Cables' laying trackside cables along the West Coast Mainline during the modernisation & electrification in the late 50s/early 60s......Signalling equipment (my side of things) was largely by Westinghouse; an American based company.
Out of curiosity, I googled: "British Insulated Callender's Cables was formed in 1945 by the merger of two long established cable firms, Callender's Cable & Construction Company Limited and British Insulated Cables. Subsidiaries could trace their roots back to submarine cable manufacturing on the Thames in the 1850s. The company was renamed BICC Ltd in 1975."