David Hart was an English writer, businessman, and adviser to Margaret Thatcher. He also had a career in the 1960s as an avant-garde filmmaker. He was a controversial figure during the 1984–85 miners' strike and played a leading role in organising and funding the anti-strike campaign in the coalfields.

The 1984–1985 United Kingdom miners' strike was a major industrial action within the British coal industry in an attempt to prevent colliery closures. It was led by Arthur Scargill of the National Union of Mineworkers (NUM) against the National Coal Board (NCB), a government agency. Opposition to the strike was led by the Conservative government of Prime Minister Margaret Thatcher, who wanted to reduce the power of the trade unions.