Were the Celts the first to settlers in brittaniain 1000bc?

The Celts were not the first settlers in Britain around 1000 BC. Prior to the Celts, various groups, including the Neolithic farmers and Bronze Age cultures, inhabited the region. The Celts began to arrive in Britain around the 6th century BC, bringing their distinctive culture and language. Thus, while they played a significant role in Britain's history, they were not the earliest settlers.