Setting up The Wargame...
A year in the making, but recorded in just one day, The Wargame explores the reality of the threat that Vladimir Putin's Russia could pose to Britain, its people and normal, everyday life.
Listen to Sky's security and defence editor Deborah Haynes outline how the game works in the video above.

The Wargame also tests the true state of the UK's defences and national resilience after decades of cost-saving cuts since the collapse of the Soviet Union in 1991.
And the scenario imagines how the UK's allies might respond, in particular the United States: would they mobilise to defend Britain in a crisis?

The scenario is based in the near future and pitches a fictional British government against a team of Russia experts in an imagined Kremlin.
Rob Johnson, who heads the Changing Character of War Centre at Oxford University, agreed to create the game after I approached him about the idea last year.
I said I would find the players and turn the project into a podcast.
The Wargame is the kind of exercise that is genuinely tested inside government.
The main difference, though, is that nothing discussed in Rob's version is classified.
It means we are able to make the whole thing public.