R (o.t.a. Western Sahara Campaign UK) v. HMRC and DEFRA  EWHC 2898 (Admin) Blake J, 19 October 2015 read judgment
Not primarily about migration, but a case arising out of the long-running conflict between Morocco, as occupying power, and the Western Sahara as occupied territory. For many years, the UN has recognised the Western Sahara as a non-self-governing territory which is entitled to exercise its right of self-determination. Morocco does not agree, and has done what occupying powers do, namely send in Moroccan nationals to flood the existing populations, add troops, and commit human rights abuses, according to evidence filed in the case.
You may be wondering how this North-West African problem got to London’s Administrative Court. This is because the challenge is to two EU measures concerning Morocco. The first is a preferential tariff (administered by HMRC) applicable to imports from Morocco of goods originating from the Western Sahara. The second concerns the intended application of an EU-Morocco fisheries agreement about fishing in the territorial waters of Western Sahara.