Note : I said "lately". I am fully aware that Ron Warhurst "advises" Nick. In fact he was out here a month ago to attend a Seminar in Christchurch which of course never happened (Earthquake !!!)
Nick has posted various aspects of what he has done on our NZrun website.
A few months ago he stated he was able to run the biggest mileage he had ever done. This is not decrying Ron at all.
I concur with HRE's comment as well.
Just an aside ; Last January Nick was touring NZ with a group of runners and came to our town (Rotorua). I had the pleasure of taking him and the crew for a run on various courses and one of the athletes I work with occasionally (and a good friend of Nick's) took him deep into our Forest.
His last run was on a course I do a lot of Tempo and interval work on .. Its a 2.5km loop track through a Thermal area (Yes! complete with boiling mud pools)
He ran 10km in 30mins .. at the time he was carrying the knee injury !!