Champion shin-kickers go Down Under

If the Brits don't die from food shortages (see below), they will be able to carry on their time-honored (?) tradition of shin-kicking. There is a Shin-Kicking Association of Britain, which provides the following history:

(Shin kicking) was once common throughout England, Wales and parts of America…miners would grapple against each other wearing only their clogs—stark naked, except for their clunky, metal-trimmed footwear. This may have been a conscious imitation of the Greeks, or it may have simply seemed like a good idea at the time.

Whatever the reason, naked shin kicking was common throughout Greater Manchester,when “hot and rebellious liquors were indulged in to excess, and the Sabbath was desecrated and made hideous by drunken orgies”.

... Another report tells of a clog fight near Manchester in 1843 between two young men named Ashworth and Clegg—“(both in a state of nudity with the exception of each having on a pair of strong boots)”. They kicked each other for 45 minutes… all for one pound (£60 today). Ashworth won, but both were severely injured. In another fight, he actually killed his opponent and emigrated Down Under, aptly enough—though it’s unclear whethethis was his choice or Her Majesty’s Pleasure.

The video depicts the British Shin Kicking Championship of 2008. I wonder whether this has any historical relationship to rugby?