Diameter of the stump is around 50cm+ - the tree was around 15m+ high - with some serious visible roots as well, so using my usual method of digging looks like serious hard work.
A quick look at Google suggests drilling plenty of 1" holes, around 10" deep, filling with Potassium nitrate granules, then water, and leave for around a month to rot before breaking it down with a mattock or similar.
Sounds a bit too good to be true...
Has anyone had an experience with this method? or car perhaps suggest an alternative?