Ow and why did the coal industry in Wales decline between 1945 1985?

State of the industry before 1945
e.g. post WW1 there was a recession in the coal market, due to a
combination of a move to oil power by shipping and the
development of coalindustries overseas.

Effect of WW2 on the industry

Labour government nationalises the coal industry, 1st January 1947
Investment meant better and more machinery and a greater emphasis
on safety, but couldnt safeguard the coal industry in Wales.

Rise of the oil industry and other factors
50 collieries closed in South Wales between 1957 and 1964.
Although there was some respite in the 1970s due to oil crisis,
by the 1980s it was almost all over for the coal industry in
Wales, and the rest of the UK.
Aberfan disaster, 21st October 1966
Effects on the industry in North Wales also

Margaret Thatcher and the Conservative Government

1984 Miners Strike
Arthur Scargill and The National Union of Miners
Ian MacGregor and the National Coal Board
Ben Curtis,  The Wilson Government and pit closures in south Wales, 1964-70 , Llafur (Labour) vol 9, no 1 (2004)

Hywel Francis & David Smith, The Fed. A history of the South Wales Miners in the twentieth century (1980)

Hywel Francis and Gareth Rees,  No Surrender in the Valleys : the Miners Strike in south Wales , Llafur (Labour) vol 5, no 2 (1989)

Keith Gildart, North Wales Miners. A Fragile Unity, 1945-1996 (2001)

Trevor Herbert and Gareth Elwyn Jones, Post-War Wales (1995)

Philip Jenkins, A History of Modern Wales 1536-1990 (1992)

Bill Jones, Brian Roberts and Chris Williams,  Going from Darkness to the Light: South Wales Miners Attitudes towards Nationalisation , Llafur (Labour) (1996)

Welsh Campaign for Civil and Political Liberties : NUM (S. Wales Area), Striking Back, 1985.

Chris Williams, Capitalism, Community and Conflict. The South Wales Coalfield 1898-1947 (1998)

John Davies, History of Wales (2006)

Kenneth O. Morgan, Rebirth of a nation: A History of Modern Wales (2002)