'Garda' Seamus visited London to pick up some tips from the Metropolitan Police.
Dressed in what looks like an authentic Irish Garda uniform, Seamus prowls Downing Street on an "exchange program".
The unsuspecting police are enthralled by the craic and the camera catches them having a few giggles at Seamus' antics.
Comparing uniforms, Seamus declares that the Metropolitan Police look far more intimidating as he's "only got a potato gun".
However, Seamus is later stopped by some concerned policemen who try to assess the risk of his fancy dress.
They thoroughly check his credentials and ask him to take his jacket off.
Game over 'Garda Seamus'.