Phil Simcock holds the current record (and those for several other off-road ITTs...) of 4 days 1 hours 43min - there's a 3part report on the Team JMC blog or Bikepackers magazine.
Know a couple of people riding, start list should be up in the next day or two...
Those pictures look pretty epic!
How long does it take? 550 miles of that terrain must take a few days. Anyone know anyone riding?