gazman2011, page-44

Gaz, research note i have which was released after detailed discussion with management states ash content of around 14-16%, and after washing of 8%

There are two seams of interest both with good depth and at shallow depths

seam a - average thicknes of 5-14m at depth 15-120M
seam b - 1-3m thickness at 140M depth

your points are relevant, however if ash content across teh two main seams is circa 15% would this alter your view?