Don't go thinking that this is some kind of site of special interest, we have laws over here to protect those. These are just tracks that may or may not have been in use for centuries, and these days are generally used by farm traffic and the occasional off-roader. It's not like you're driving through aincent saxon hill-forts or anything like that. A large number of our tarmac roads were also "ancient lanes", villages grow into towns and towns into cities, and some of the tracks they use grow with them. Green Lanes are just tracks that never grew into tarmac roads due to lack of traffic.
As for "are there other places to go", well not really, only dedicated commercial off-road sites which offer more obstacles but less scenery, more traffic, more expense and you usually get bored after about 2 hours. The antis are now trying to ban us from the green lanes, if they get their way (and anything 4x4-related over here is a target for enviro-nutters with no sense of perspective) then we'll only have access to the commercial off-road sites, or to private farm land with agreement from farmers.
Also, while the lane was very muddy, I didn't get the impression that they made it that way. While I'm not trying to defend the article to the hilt I don't think people should read too much into it.