It would be possible to score a first class grade if a paper was less strong on one or two of the above ten criteria, as long as there was strength in depth in regards to the other identified aspects. When it comes to upper first class work all the above ten criteria must be comprehensively met and there must be strong evidence, in particular, that criterion 10 is amply satisfied. Upper first class work must be deemed head and shoulders above averagely good submissions in all respects, and must display original, insightful, authoritative legal skills in abundance. No significant mistakes will be tolerated. There is a big difference between first class and manifestly upper first class work. Just for example, some law lecturers have reported that as a general rule of thumb they expect upper first class work to utilise around double the number of sources and references that solid first class work utilises.