Since the creation of modern immigration controls in 1905, foreign nationals evading immigration control or committing crimes were regarded as a police matter and those people arrested were put before the courts whereupon they would be prosecuted and go through the deportation process. The United Kingdom Immigration Service's enforcement arm evolved gradually from the early 1970s onwards to meet demand from police for assistance in dealing with foreign national offenders and suspected immigration offenders within the UK. The wider history of UK immigration control is dealt with under UK immigration control - history.