Mother Bertha Music Ltd & Anor v Bourne Music Ltd

Refusal of leave to amend pleadings is a discretionary case-management decision. The appellate court interferes only if the judge applied a wrong principle or reached a decision that was plainly wrong. Mere lateness is not enough by itself, but delay may have cumulative effects. The court may weigh the likely loss of a fixed trial date, serious or irreparable prejudice, the need for new discovery and evidence, and whether the proposed amendments are immaterial or useless. This includes the practical consequences of introducing new legal issues and possible defences such as ratification, waiver or estoppel. Later evidence will not justify intervention unless it substantially erodes the basis of the first-instance decision.

Mother Bertha Music Ltd & Anor v Bourne Music Ltd concerned entitlement to copyright in a song composed in 1958. The plaintiffs sought to re-amend their statement of claim to allege that an assignment made without leave required by a Californian court order was unlawful and void, and that a contractual provision produced the same result under New York law.

The application was made shortly before a third fixed trial date. Robert Walker J refused leave, principally because the amendments appeared immaterial or useless and would cause serious prejudice through delay, new legal issues and possible factual issues concerning ratification, waiver and estoppel. The central issue was whether the Court of Appeal should interfere with that discretionary decision.

Lord Justice Nourse delivered the reasoned judgment. Lord Justices Saville and Brooke agreed. The application was dismissed with costs.

1. Appellate restraint. Whether pleadings should be amended is essentially a matter for the discretion of the first-instance judge. The appellate court could intervene only if the judge had applied a wrong principle or reached a decision that was plainly wrong. The Court of Appeal found no such error.
2. Delay and prejudice. Mere lateness alone is insufficient to refuse an amendment, but the effects of delay may be cumulative. The judge was entitled to consider the likely loss of the fixed trial date, the difficulty of investigating Californian and New York law, the need for further discovery and evidence, and the potentially wide factual issues raised by ratification, waiver and estoppel. Those consequences could produce serious or irreparable prejudice.
3. Materiality and usefulness. The judge was also entitled to take an instinctive view that the proposed amendments were highly unlikely to assist, given the long period during which the songwriter and his companies had conducted their affairs on the basis that the assignment was valid. The further evidence concerning the songwriter’s knowledge did not substantially undermine that conclusion, since the knowledge of lawyers, agents and other relevant persons could also matter.
4. The suggested course of allowing the amendments but postponing their use until after trial on the existing pleadings might have addressed trial-readiness concerns, but it did not overcome the independent concern that the amendments were likely to be immaterial or useless. The Court of Appeal did not determine the underlying copyright or foreign-law issues.

• High Court (Chancery Division): On 26 November 1996, Robert Walker J refused the plaintiffs leave to make further amendments to the statement of claim.
• Court of Appeal (Civil Division): The application challenging that refusal was dismissed with costs.