Remember this when someone starts spouting off about immigrants
The major part of dealing with immigrants is paperwork, not how many turn up on the Kent coast.
Similar problems with the British justice system, the reason offenders are not promptly dealt with is the time it takes to get them before a judge and jury. Years of cutting justice department budgets because some of the money might be spent on lawyers providing legal representation so the accused are processed fairly and equitably by the legal system or providing prisoners with education and training so they are less likely to reoffend, has left the system short of capacity.
Justice delayed is injustice to victims, inefficient and diminishes the deterrence of "stiff sentencing" so beloved of the populist approach to criminal theory