During the following Younger Dryas stadial (colder period), c.10890 - 9650 BC, Federmesser sites were abandoned, and Cumbria (along with the rest of Britain) was not permanently occupied until the end of the Younger Dryas period, 11,600 years ago (that is, during the Mesolithic era).
It is thought that settlers made their way across Morecambe Bay and along the fertile coast.