Very unusual accident, that R22 G-BXUC. Already rated PPL pilot flying solo.
I mean, all sorts of mishaps happen, but would rolling on throttle (and not noticing first second or two), with collective ALL THE WAY DOWN, make the heli light enough on skids to start spinning and scraping the ground? I haven't tried/done it myself, just wondering. Being solo and low on fuel could then be a factor.