It sure is ...
Tiered Tooth (Hericium cirrhatum)
H. cirrhatum is a very rare tiered tooth fungus of dead hardwood trees in old woodland. It has been reported from several sites in southern England, notably the New Forest, but nowhere is it common. The above images, of a selection of fruiting bodies found on a fallen beech, are from Sussex. This remarkable fungus and other members of the Hericiaceae are distinguished by their icicle-like spines. H. cirrhatum produces irregular cream fruitbodies with little or no real stem. The whole fruitbody is usually 5 to 10 cm across, often occurring in tiered groups covering a large area. As they develop they often overlap and form fused groups.
Buczacki, S., Shields, C. and Ovenden, D. (2012). Collins Fungi Guide: The most complete field guide to the mushrooms and toadstools of Britain & Ireland. London: HarperCollins, p. 470, fig. p. 471.
O’Reilly, P. (2016). Fascinated by Fungi – exploring the majesty and mystery, facts and fantasy of the quirkiest kingdom on earth. Llandysul: First Nature, p. 233.
Phillips, R. (2006). Mushrooms. London: Pan Macmillan, p. 327, fig. g.
Sterry, P. and Hughes. B. (2009). Collins Complete Guide to British Mushrooms and Toadstools. London: HarperCollins, p. 280, fig. p. 281.