While it remains unlikely, if push came to shove and Russia did levy one of its many nuclear warheads against the UK, how bad would the damage be?

Axar.az report that citing Daily Express according to NuclearSecrecy.com, one option is the Topol SS-25, an 800 kiloton nuke currently in Russia’s arsenal.

It shows that, if it was dropped right on Westminster in Central London, the damage would be predictably catastrophic.

A 2.97KM2 area of central London would be wiped away. The Nuke Map states: “Maximum size of the nuclear fireball; relevance to damage on the ground depends on the height of detonation. If it touches the ground, the amount of radioactive fallout is significantly increased. Anything inside the fireball is effectively vaporized.”

This includes parts of Westminster, as well as St James’s Palace and the London Eye.

The next zone is the ‘moderate blast damage radius/ An area of 134Km2, this would collapse buildings and start fires. The map states: “At 5 psi overpressure, most residential buildings collapse, injuries are universal, fatalities are widespread. The chances of a fire starting in commercial and residential damage are high, and buildings so damaged are at high risk of spreading fire. Often used as a benchmark for moderate damage in cities.”

This includes Camden, Kensington, Brixton as well as Shoreditch, St Pancras, Clapham and Chelsea as well as Clapham Junction, Paddington and Battersea.

The third zone, further from the point of impact, is 384km2, and includes Chiswick, Streatham, Tooting, Stratford, Hampstead, Lewisham, Greenwich and Sydenham as well as Fulham and Walthamstow.

The nuke map says this zone would also have a rough time of it: “Third degree burns extend throughout the layers of skin, and are often painless because they destroy the pain nerves. They can cause severe scarring or disablement, and can require amputation.”

Finally, the last zone around the edge of London would be the light blast damage radius. This includes Wembley, Edgware, Hounslow, Barking, Chipping Barnet, Croydon, Sutton, Woolwhich and Enfield.