Sir William McAlpine was a prominent British businessman and philanthropist, known for his significant contributions to the railway industry. He was the chairman of McAlpine Group, a construction and civil engineering company founded by his family. Under his leadership, the company undertook various major projects, including infrastructure developments across the UK. In addition to his business achievements, Sir William was an avid supporter of heritage railways and played a key role in preserving historical locomotives. He was also involved in various charitable activities, reflecting his commitment to community service and the promotion of railway heritage in Britain.