I've found them in hampshire, I came across them by chance, 200 in a 1mx1m area! I think that they will The increase in chemical fertiiser in pastures has likely reduced liberty cap numbers, as well as the occasional application of fungicides by irate land owners. Also not every pasture one encounters will have the mirth fruits. P. cyanescens does seem to be quite dense in it's fruiting in mulch. Kew gardens does support a healthy number, as does RHS Wisley in surrey. spreading them by collecting some woodchips with mycelium does have some success. Also, the fact that they mostly grow in public areas does have its merits. Being chased by angry farmers does wear a bit thin after a while. Identification is easy, there aren't any other fungi with such wavy caps that bruise as blue as these.