Immigration – Detention. The Administrative Court held that the claimant Chinese national's immigration detention between 13 August and 15 September 2016 had only been unlawful between 8 and 15 September 2016. There was no reason why the reasonable grounds decision concerning the claimant's possible trafficking could not have been taken, at least, by 7 September 2016, namely, within the five-working-day window referred to in the Competent Authority Guidance.