“… the legal obstacle is not necessarily, or even usually permanent. If it arises from conditions in the individual’s home country, those conditions may change or he may come into favour with the authorities when previously he was not. If it arises from his family connections in the United Kingdom, those may easily change. If someone in his position cannot at present be deported because to do so would infringe his article 8 rights, and if indefinite leave to remain were thereupon to revive, he would remain irremovable if he turned his back on his family or they on him, as may not infrequently occur.”
“a safety valve, with an appropriately high threshold of application, for those exceptional cases involving foreign criminals in which the private and family life considerations are so strong that it would be disproportionate and in violation of Article 8 to remove them.”
“of course, different considerations may apply where there is relevant fresh evidence that was not available at the date of the hearing or a change in the law, and the principle has no application where there is a change in circumstances or there are new events after the decision”
“the changes in the legislation and immigration rules, and the stricter approach to the public interest mentioned by the FtT at [70] were sufficient in themselves to constitute the said change in circumstances.”
“it is not a proper implication from Antonio that, where an appeal has been allowed, the Secretary of State can simply take a fresh decision to deport, or indeed a fresh decision, based upon the proposition that a relevant exception preventing the deportation of a foreign criminal no longer applies, absent a material change of circumstances. That would indeed undermine the finality of judgments. Absent a successful further appeal, and absent a material change in circumstances, such a judgment stands.”
“the principle of res judicata applies to give finality to that determination unless an intention to exclude that principle can properly be inferred as a matter of construction of the statutory provisions.”
“It is sometimes said that there is no rule of res judicata or issue estoppel in immigration appeals. Technically speaking, that must be right. The fact that there has been a previous unsuccessful application and appeal does not prevent an individual from making a new application for relief, whether by way of entry clearance, leave to enter, leave to remain, asylum or non-removal. In in-country asylum and human rights cases, the possibility of a formal issue estoppel is effectively ruled out by the principle that matters have to be decided as they are at the date of the decision, whether administrative or judicial. That date will, ex hypothesi, be different from any consideration of a previous claim.”
“as there was no vested right and as there would not be any great unfairness in the circumstances of this case to apply the 2014 regime to the claimant, the presumption against retrospective legislation may be rebutted.”