sentences:  However, former Home Secretary David Blunkett said that "Detention, while regrettable, is an essential part of effective immigration control - to affect removal, establish identity or prevent absconding.Where it is necessary to detain individuals with children, we believe it is better that the children remain with their parents rather than split up the family".The Scottish Government has no direct authority over Dungavel, as asylum and immigration are matters reserved to the UK Parliament.