Aberfan Disaster at 60: What Happened in 1966 and Why It Still Matters

What Happened on 21 October 1966

On the morning of 21 October 1966, Tip No. 7 — part of a group of seven colliery-waste tips built on the mountainside above Aberfan, a mining village near Merthyr Tydfil in south Wales, that together held about 2.1 million cubic metres of spoil — gave way after days of heavy rain, according to the British Geological Survey (BGS). About 107,000 cubic metres of liquefied slurry broke loose from the tip and surged down the slope.

The slide destroyed Pantglas Junior School, which was in session at the time, along with 18 houses, before coming to a halt at around 9:15 a.m., the BGS says. The disaster killed 144 people — 116 children, most aged seven to ten, and 28 adults, including five teachers. History.com describes it as one of the United Kingdom's worst mining disasters; the BGS records that 109 of the dead were pupils and staff of the junior school.

Who Was Blamed, and What Changed

A tribunal of inquiry examined the causes of the disaster and placed responsibility on the National Coal Board (NCB), the body that managed the tips. According to History.com's reporting on the tribunal's findings, the disaster was the result of the following, rather than deliberate wrongdoing.

A disaster fund, set up on the day of the disaster, eventually raised the equivalent of about $16.6 million in today's money, History.com reports. The money paid for village repairs and support for injured and bereaved families, but bereaved parents were pressed to prove 'closeness' to their dead children to receive £500 in compensation. Public money spent clearing the remaining tips was eventually taken from the same charitable fund and was not repaid by the authorities until 1997 — without interest, according to History.com.

The Queen's Delayed Visit

Queen Elizabeth II did not travel to Aberfan in the immediate aftermath, sending Prince Philip instead. She visited the village eight days after the disaster, following press and public criticism, History.com and nation.cymru report. In 2002, according to History.com, she described not going sooner as one of the biggest regrets of her reign. She returned to Aberfan three more times during her life, including to open Ynysowen Community Primary School — built after the disaster — in 2012, according to nation.cymru.

The 60th Anniversary: Charles, Camilla and William in Aberfan

On 21 October 2026, exactly sixty years after the disaster, King Charles III, Queen Camilla and the Prince of Wales are visiting Aberfan together, nation.cymru reports. Planned events include a visit to the Aberfan Memorial Garden, on the site of the former Pantglas school, followed by a prayer and a moment of silence during which the King and the Prince will lay wreaths and the Queen will place a posy.

The royal party will then go to the Aberfan and Merthyr Vale Community Centre to meet survivors, bereaved families and retired emergency workers, including a 96-year-old former police officer who served at the time of the 1966 disaster, according to nation.cymru. Jeff Edwards, who survived the disaster at the age of eight, is due to speak before introducing the King at a community reception that will also feature a performance by the Ynysowen Male Voice Choir. Prince William is scheduled to unveil the Aberfan Memorial Tree at Ynysowen Community Primary School.

Why Aberfan Still Matters

The BGS includes Aberfan among its landslide case studies, describing how heavy rainfall triggered the collapse of a man-made colliery-waste tip. History.com's account of the disaster fund — families asked to prove closeness to dead children for compensation, and the delay, without interest, in repaying money spent on tip clearance until 1997 — remains part of how the disaster's aftermath is documented. Queen Elizabeth II's delayed 1966 visit, and her later description of it as one of the biggest regrets of her reign, is also recalled in coverage of this year's joint visit to Aberfan by the King, Queen Camilla and the Prince of Wales, according to nation.cymru.