§ Mr. Mike O'Brien
Reasons for orders not being given effect could be established only by examining each case individually at disproportionate cost. However, a delay may arise for one or more of the following reasons: an appeal or other legal challenge, an asylum application, difficulties in obtaining a travel document, the subject has still to complete a custodial sentence or cannot be traced. Some of the latter may have left the country without informing the Immigration Service. Orders issued later will inevitably be activated outside the reference period.