This judgement relates to a number of preliminary issues in connection with proceedings relating to the validity of a divisional patent in the name of Neurim and alleged infringement by Viatris (previously Mylan). During the proceedings, Neurim amended the claims of the divisional patent to correspond to the claims of the parent patent, which had been held to be valid by the UK High Court but subsequently revoked by the EPO. The preliminary issues relate to whether Mylan is issue estopped from challenging the validity of the divisional and whether Neurim’s conduct is abusive.