Australians Sam Hatfield and Fiona Skelton have taken their 'crusade' to London.

They stripped off beside some of the city's most iconic tourist landmarks "to make being comfortable with nudity cool."

The two "crusaders without clothes" have gone bare in public as part of their internet project "Nakedme", a "worldwide crusade" to "make nudity more acceptable."

They posed daringly naked at the Buckingham Palace, The Houses of Parliament, The London Eye and the Tower Bridge.

They also rendered their own take on the Beatles' iconic image on Abbey Road, strolling nude on the crossing.

The shots taken in London are part of a short film that the duo has made, it's called "Bare Rollin' In The Big Smoke." (See video below)

The London stunts are not the first time that the two Australians have stripped off in public to promote nudity. They have also gone to the scenic town of Wuppertal in Germany where they danced naked with commuters on a suspended railway.

Earlier, they went to Sydney Harbour Bridge too clad in nothing but boots, helmets and gloves.

Their website says: "By a twist of fate it has become incumbent upon us to lead this final battle for carnal freedom.

"Where others fail we will prevail, through audacity and wild abandon, for we are the successors of the revolution to storm this last bastion of Victorian cultural taboos. We shall ride the winds of change, while simultaneously feeling the wind on our nether regions.

"Because there's one thing they didn't count on: they can't beat our shamelessness with shame. This is the Nakedme Show, and we are the crusaders without clothes."