Good question Adamski. My understanding of the old system was that you could either claim a min speed of 14.3kph or a pro rata over-distance increment - but not both
I sort of assumed that under the new system, where the actual distance ridden can be verified from the track log, the 14.3kph min speed option would be withdrawn in favour of increments at the rate of 1hour per 15km.
I would really like to know if this is the case. For instance I may have been uncannily fortunate on my DIY 200 last Wed' which took me exactly 13 hours and 28 mins (really) and was 23k over distance!