ديفيد بيل
Despite having over a million registered users on its website, Urban Freeflow has polarised opinion within the parkour and free-running communities for its self-appointed leadership of the movement and its commercialisation of what many consider to be a grass-roots movement. Due to its position as the largest UK based group, it is the popular choice for new traceurs, thus guaranteeing it a constant stream of new customers. However, many become disillusioned over time, and migrate towards other groups which better represent their ideals. It has been criticized over the years more than any other free running or parkour group. It stems from the fact that they claim to be the "Official Worldwide Freerun/Parkour Network", while the website is neither multilingual nor affiliated with David Belle, the founder of parkour. UF does however have some affiliation with Sébastien Foucan, the founder and lead ambassador of freerunning. Worldwide Jam may have also contributed to some of the criticism of Urban Freeflow because of an ongoing feud between UF and Worldwide Jam.