The Brighton arsenal was discovered when police were called to the home of a man who had died. Officers were shocked to find the size of the haul and that some of the weapons were loaded.
Professor Squires asked: "How did the anonymous Brighton resident amass for himself a stock of weapons – in a country with what are said to be some of the toughest gun controls in the world?"
Professor Squires has written about secret caches in his latest book just published, Gun Crime in Global Contexts, in which he estimates there are in the order of 850 million firearms in the world today – one for every seven people on the planet – and the majority, 650 million, are in the hands of civilians.
He has been working on the book for four years and compares gun control regimes in countries such as the UK and wider Europe – where gun laws are tight and gun violence relatively rare – with countries like the USA, South Africa and, topically, Brazil, where illegal weapons are commonplace and gun murders frequent, and with conflict zones and failed states in parts of Africa and Central America where "gun violence is endemic and life is, apparently, cheap".
Most of those firearms in the world today, he said, were produced in and supplied by developed first world countries, the "so-called civilised societies".
Professor Squires said: "These guns cause panic in the streets when they are criminally misused in the safe European democracies but they are directly responsible for 750,000 deaths and countless more injuries when they are employed in the poorest parts of the world.
"Compounding the inequalities, it is mainly men who own these weapons: the international evidence demonstrates clearly that highly-weaponised communities are vastly more dangerous for women and girls."
Professor Squires said firearm proliferation is now understood to be a direct contributor to regional conflicts and crime in both the safest and most dangerous societies in the world. His book brings together a series of inter-disciplinary perspectives, from criminology to peace studies, "to understand the inter-related dynamics of supply and demand which are weaponising the world".