
They write: ‘A claim which has not been brought “promptly” may be thrown out by the court if people have already begun to rely on the decision being challenged, and therefore it would have a negative impact on those people for the court to set the decision aside, and the claimant should have acted more quickly to avoid that detriment.
‘However… it might be possible for a claimant accused of not bringing a claim promptly to say that the court can side step the potential prejudice to people who had relied on the newly invalid government action, by making a suspended quashing order.’