Elements of Celtic music, dance, and folklore can be found within England (e.g. Yan Tan Tethera, well dressing, Halloween), and the Cumbric language survived until the collapse of the Kingdom of Strathclyde in about 1018. England as a whole comprises many distinct regions, and some of these regions, such as Cumbria, Lancashire, and Western Yorkshire can claim more Celtic heritage than others. In 2009, it was claimed that revival of the Cumbric language was being attempted in Cumberland, England, however the idea that "Cumbric" was separate from Old Welsh has been criticised as stemming from the difficulty that many English historians have with accepting Old Welsh as the language once spoken all over England. It was suggested by Colin Lewis in Carn magazine that revivalists in the north of England use Modern Welsh to enable use of Welsh's existing rich cultural basis rather than having to "reinvent the wheel" in much the same way as has been done successfully in Derbyshire, another area where elements of Celtic culture survive.