“48. As I see it, the effect of Doherty is two fold. 49. First, there is no formulaic or formalistic restriction of the factors which may be relied upon by the licensee in support of an argument that the council’s decision to serve a notice to quit, and seek a possession order, was one which no reasonable council would have taken. Such factors are not automatically irrelevant simply because they may include the licensee’s personal circumstances, such as length of time of occupation. In Doherty, where the family had been in occupation for a substantial time without causing any trouble, but the council wanted to use the site in a different way, it might also be thought relevant whether the council had taken any steps to offer the family, or help them to acquire, alternative accommodation. 50. Secondly, the question whether the council’s decision was one which no reasonable person would have made is to be decided by applying public law principles as they have been developed at common law, and not through the lens of the Convention. 51. There is no conflict between these two propositions, which should be capable of being applied without additional complexity. As Baroness Hale observed in Kay at para 190, in a passage cited by Lord Walker in Doherty at para 108: “It should not be forgotten that in an appropriate case, the range of considerations which any public authority should take into account in deciding whether to invoke its powers can be very wide: see R v Lincolnshire County Council ex parte Atkinson (1995) 8 Admin LR 529; R (Casey) v Crawley Borough Council[2006] EWHC 301 (Admin) .” 52. Having said that the question whether the council’s decision was unreasonable has to be decided by applying public law principles as they have been developed at common law, it is to be remembered that those principles are not frozen. Even before the enactment of the HRA, our public law principles were being influenced by Convention ways of thinking. Since its enactment, the process has gathered momentum. It is now a well recognised fact that the Convention is influencing the shape and development of our domestic public law principles, whether one uses the metaphors of embedding, weaving into the fabric, osmosis or alignment. (See the judgment of Lord Walker in Doherty at para 109).” “It should not be forgotten that in an appropriate case, the range of considerations which any public authority should take into account in deciding whether to invoke its powers can be very wide: see R v Lincolnshire County Council ex parte Atkinson (1995) 8 Admin LR 529; R (Casey) v Crawley Borough Council[2006] EWHC 301 (Admin) .”
“58. In my judgment the argument is unsound in principle and on authority. As a matter of principle, if the decision to issue a notice to quit was not unlawful at the time of the service of the notice, the notice was valid. I cannot see a principled basis on which a notice valid at the time of service could be retrospectively invalidated by reason of later developments.” 57. On authority, he said this in relation to Doherty at para 60: “60. Mr Berkley sought to argue that this approach was implicitly inconsistent with the approach of the House of Lords in Doherty. He had to argue that the supposed inconsistency was implicit, because there is nothing explicit in Doherty to support Mr Berkley’s argument. Nor can I see anything in Doherty which provides implicit support for it. The purpose of the remission ordered in Doherty was so that the court could probe the facts on the basis of which the council had made its decision, relating to the council’s plans for the future use of the site. Lord Hope stated at para 55 that the requisite scrutiny would not involve the judge substituting his own judgment for that of the local authority. It cannot therefore have been envisaged that the court would make a judgment of the reasonableness of the council’s decision otherwise than on the facts as they reasonably appeared, or should have appeared, to the council at the time of making its decision.”