Revealed: The UK areas safest in a national catastrophe – and those most at risk

A new postcode checker has ranked the UK areas most and least vulnerable in the event of a national catastrophe, with regions with military sites and major cities scoring worst.

The online tool, dubbed the “Doomsday” postcode checker, was launched by Serhii Kashevko, a 30-year-old Ukrainian game developer.

Designed in response to the government’s “Be Ready” guidance – which advises households to store non-perishable food, bottled water, and wind-up radios – the tool has already logged more than 60,000 searches.

Council areas are graded on an A to G risk scale based on a combination of factors, including their distance to potential missile targets, hospital access, and natural geographic barriers.

While these calculations are not an exact science, the data highlights stark regional divides.

Below, The Independent maps out the findings.

Where are the safest places in the UK?

According to the analysis, the safest parts of the UK are concentrated in Northern Ireland and rural Wales, where low population densities and limited military infrastructure contribute to lower risk scores.

Fermanagh and Omagh in southwest Northern Ireland ranks as the safest district overall, benefiting from its sparse population, agricultural land and limited military presence.

Gwynedd, protected by the mountains of Eryri (Snowdonia), ranks as the safest area in Wales, while the remote Shetland Islands come out on top in Scotland.

In England, Thanet in Kent is ranked the safest area, with its coastal location and distance from major inland manufacturing and transport routes.

For Mr Kashevko, the rankings draw on real-life experience: “I looked at the effects of Russian attacks on Ukraine,” he told The Independent. “One of the factors I used to assess areas was how populated they are ... something I understood with how much more damage Russian attacks do in crowded areas of Ukraine.”

The UK areas most exposed to a national catastrophe

The picture is markedly different around major defence installations and densely populated urban centres.

Gosport in Hampshire comes in as the most vulnerable area in the country, with 15 military or nuclear sites within a 19-mile radius of the coastal town.

Other communities close to significant defence facilities also perform poorly. These include areas neighbouring the GCHQ headquarters in Cheltenham, as well as the naval dockyards in Plymouth and on the River Clyde.

The majority of central London also features near the bottom of the rankings. The concentration of government institutions, including Whitehall and the Ministry of Defence, alongside major financial and telecommunications infrastructure, contributes to the capital's exposure in the tool's assessment.

London’s vast population and dependence on complex supply chains present additional challenges in the event of widespread disruption, particularly if essential services and transport networks were affected.

The findings come as the government steps up its efforts to encourage households to brace for a potential crisis.

Since the launch of its “Be Ready” campaign, retailers have reported sharp increases in demand for wind-up radios, torches and tinned food – items intended to help households cope if electricity, communications or access to everyday essentials are disrupted.