Copper Age in western Britain

At www.dailypost.co.uk/news/north-wales-news/anglesey-mysterious-artefact-d… … the Neolithic in western Britain, or that part close to the Great Orme copper mines, has come up with evidence of copper artefacts as early as 3500BC. Does this warrant redefining a large tract of what is now the Neolithic (stone using) as Copper Age (even when such objects are rare in an archaeological context)?