"The judge was plainly right to hold that this was not a case of legitimate expectation and so Ground 1 is bad. The other grounds are essentially factual complaints. The judge was entitled to take the view of the facts that he did; in particular (although as the judge said at paragraph 78(iv) the PCO had been discourteous and high-handed) his finding that the PCO did not act from an improper motive is not realistically assailable."
"At the time of the claim, the Claimant was only supplying systems that were the subject of Approval 3 (the modified system): and had not expressed any intention of supplying systems subject to Approvals 1 and 2 (the unmodified system) in the future. On the evidence before me, the scope for commercial exploitation of at least Approval 1 was very small if not nil. Although it is true that the withdrawal was disproportionate in including Approval 1 and 2 (see judgment22 April 2008 at 79). The whole thrust of the claim concerned the withdrawal of authorisation in respect of the modified system until the hearing itself - when the concession in relation to Approvals 1 and 2 was quickly made by the defendants."
"The claimant's claim for damages is compatible with the judgment of Mr Justice Hickinbottom herein."
"The court has an inherent jurisdiction as a matter of discretion in the interests of finality not to allow a particular issue which has already been litigated to be reopened."
"There seems no obvious reason why estoppels on similar subsidiary issues could not arise in applications for judicial review."
"In my view these cases establish the following propositions: "
"...withdrew approval for the modified system without having any or any sufficient regard to the fact that the system was fitted on a taxi which was in an inadequate mechanical condition and in particular had not had its injectors changed recently... "
"Withdrew approval for the modified system without having any or any sufficient regard for the fact that a) the system had passed the tests carried out by ELUK; b) that it therefore worked to a standard sufficient to satisfy Euro 3 on a properly conditioned vehicle; and c) that it was at least as effective as alternative systems on the market."
"Had not expressed any intention of supplying systems subject to Approvals 1 and 2 in the future."
"The scope for commercial exploitation of at least Approval 1 was very small, if not nil."
"The whole thrust of the claim for judicial review concerned the withdrawal of the approval for the modified system."
"The claimant believes that these falsehoods were published maliciously and with a view to causing pecuniary harm."