The Home Secretary has outlined a shocking and illegal breach of trust on the part of Home Office and immigration officials. He will, of course, be aware that the Home Office is the only Department of its kind in Europe that operates an arbitrary and non-limited form of detention. Under that system, 27,000 people were detained last year, 50% of whom were subsequently released. They included one of my constituents, Duc Nguyen, a Vietnamese national who is a victim of human trafficking and human slavery. It is against Home Office protocols to detain such people. Will the Home Secretary undertake to investigate whether coercive DNA-gathering practices have been taking place in detention centres under the Home Office?