Seven miles off the east coast of England, on an old military fortress, lies The Principality of Sealand. In its 49-year history Sealand has survived hostile takeovers, raging storms and fireballs. But it had never, until recently, staged its own running race.

Enter Simon Messenger, whose ‘Around the world in 80 runs’ has seen him run everywhere from Madrid to Madagascar, Athens to Ust-Kamenogorsk. No Half Measures follows Simon’s most audacious adventure so far: to become the first ever person to run a half-marathon on Sealand.

Look out for Men’s Running’s managing editor, Rick Pearson, getting a bollocking for not bringing an up-to-date passport…

The film was made be Let it Howl and the adventure was the brainchild of Simon Messenger, whose “Around the world in 80 runs” challenge has seen him run everywhere from Macau to Madagascar. You can find him on Twitter @80_runs