The New Yorker has published an interesting article about John Barker and premonitions of the Aberfan disaster:
The psychiatrist who believed people could tell the future [EXTERNAL LINK].
Barker wrote an article about premonitions of the Aberfan disaster for the Journal of the SPR:
Barker, J.C. (1967). Premonitions of the Aberfan disaster, Journal of the SPR, 44, 169-81.