Two of the world’s first desktop computers have been discovered during a house clearance. The Q1, which was launched in 1972, changed the way we use computers today.

These two models, which are among only three known surviving examples worldwide, were found hidden under boxes during a house clearance in London by waste firm Just Clear. The staff at Just Clear, who aim to salvage and reuse as many items as possible, didn’t know what they had stumbled upon but decided to set them aside until they could find out more.