In its last ever IP judgment, the House of Lords restored Matthew Fisher’s claim to a declaration that he owned 40% of the copyright in Whiter Shade of Pale, after the Court of Appeal found his claim barred by delay.
IPKat has an extensive post and explanation.
As summarised by IPKat, their Lordships focused on the fact that Mr Fisher was seeking a declaration and not an injunction. In doing so, they indicated that the remedy of injunction might well not follow as opposed to damages:
If the declarations set aside by the Court of Appeal are reinstated, then, were Mr Fisher subsequently to apply for injunctive relief to prevent unauthorised use of the work, such an application would be dealt with on its merits. If the court was satisfied that it would be oppressive to grant an injunction in the particular circumstances, for instance because of prejudicial delay, it would refuse an injunction to restrain the infringement, and leave Mr Fisher to his remedy in damages …
Their Lordships also pointed out that the Copyright legislation, unlike real property, does not recognise a concept of acquisition of property by adverse possession.
Fisher v Brooker  UKHL 41