The authors rewrite the character of Early Mesolithic settlement in Europe with their new research at one of its most famous sites. The picture of small mobile pioneering groups colonising new land is thrown into contention: far from being a small hunter-gatherer camp, Star Carr in 9000 cal BC extended for nearly 2ha and involved the construction of an estimated 30m of lakeside waterfront and at least one post-built house. With some justice, they suspect that the ‘small groups’ of Early Mesolithic Europe may have their rationale in the small excavations of archaeologists.