Open letters have been written by Parkour Argentina and Parkour Singapore, backing Parkour UK's position on the "encroachment and misappropriation" of parkour/freerunning.

Similar moves have also been made by other parkour national governing bodies in France, Australia and New Zealand, South Africa.

The German, Swiss, Finnish and Swedish communities have also thrown their support behind Parkour UK's campaign, spearheaded by chief executive Eugene Minogue.

In their letter, Danish-based Street Movement said: "We reject the assertions of FIG secretary general, Andre Gueisbuhler, regarding the history of parkour as inaccurate and ill-informed.

"We support the stance taken by Parkour UK, Federation de Parkour, Australian Parkour Association and the New Zealand Parkour Association along with numerous other open letters issued by communities within countries that, like Denmark, represent self-organised communities without a formal national governing body.

"The Danish parkour community is committed to keep this practice culturally independent and sovereign."

Last month, leading American-based group, the APEX School of Movement, signalled their opposition to FIG after initially supporting their plans.

They announced the end of its collaboration with FIG, citing "a lot of conflicting information" that had surfaced.

This included matters regarding control and protection and the naming and governance of parkour.

It followed the apparent breaking of a promise not to use the phrase "parkour" while promoting the new discipline.

Minogue has published a document purporting to be a "Road Map for Parkour" drawn-up by FIG as part of their plans for the sport.

It also included the unveiling in July of a World Cup series, due to begin in 2018, as well as a detailed set of competition rules to be drawn-up by October.

Under the proposed timetable, the Mouvement International du Parkour, the French organisation claiming to be the founders of the sport, would be incorporated as part of FIG.

FIG have pressed ahead with their plans to incorporate a parkour discipline into gymnastics, despite the mounting opposition from the national governing bodies and organisations,

FIG recently held its inaugural Obstacle Course World Cup in Montpellier as part of the the International Festival of Extreme Sports in the French city.

FIG claimed it brought "smiles to the faces of athletes, spectators and students of parkour alike".

They added that "hundreds of people of all ages were introduced to parkour through dedicated classes in a dedicated place within the festival". 

FIG also claimed the speed and freestyle competitions demonstrated the "very highest levels of athleticism and artistic creativity".