The King has described the Aberfan disaster which killed 116 children and 28 adults as the “most tragic of days imaginable” on its 60th anniversary.

Pantglas Junior School and a number of nearby houses in the village near Merthyr Tydfil, south Wales, were catastrophically engulfed in coal slurry after the colliery spoil tip collapsed on 21 October 1966.

King Charles III, Queen Camilla and the Prince of Wales joined survivors and bereaved families on Wednesday and laid wreaths and a posy with the last surviving teacher in the Aberfan Memorial Garden, located on the site of the school.

The King also paid tribute to the community’s strength, resilience and “unconquerable spirit”.

Warning: This story contains upsetting details that some may find distressing

About half the children from the school died when excavated mining debris from the Merthyr Vale Colliery was dislodged, and 150,000 tonnes of coal waste came thundering down the hillside.

Emergency services, miners and people who rushed to the village began an around-the-clock battle to dig out those trapped by the debris.