A colliery spoil tip <a href="https://en.wikipedia.org/wiki/Aberfan_disaster" id="mwwA" rel="mw:WikiLink" title="Aberfan disaster">slips onto houses and a school in the village of Aberfan</a> in Wales, killing 144 people, 116 of whom were schoolchildren.<sup about="#mwt28" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-3"}}' id="cite_ref-3" rel="dc:references" typeof="mw:Extension/ref"><a href="./October_21#cite_note-3" id="mwwQ" style="counter-reset: mw-Ref 3;"><span class="mw-reflink-text" id="mwwg">[3]</span></a></sup>
<span class="mw-reference-text reference-text" id="mw-reference-text-cite_note-3"><cite about="#mwt25" class="citation web cs1" id="mwBvE"><a class="external text" href="https://www.bbc.co.uk/news/resources/idt-150d11df-c541-44a9-9332-560a19828c47" id="mwBvI" rel="mw:ExtLink nofollow">"Aberfan: The mistake that cost a village its children"</a>. <i id="mwBvM">www.bbc.co.uk</i><span class="reference-accessdate" id="mwBvQ">. Retrieved <span class="nowrap" id="mwBvU">12 November</span> 2020</span>.</cite><span about="#mwt25" class="Z3988" id="mwBvY" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.bbc.co.uk&amp;rft.atitle=Aberfan%3A+The+mistake+that+cost+a+village+its+children&amp;rft_id=https%3A%2F%2Fwww.bbc.co.uk%2Fnews%2Fresources%2Fidt-150d11df-c541-44a9-9332-560a19828c47&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AOctober+21"></span></span>