Investors Compensation Scheme Ltd v West Bromwich Building Society [1998] 1 WLR 896

Investors suffered losses after financial advice led them to mortgage their homes and invest the proceeds. They received compensation from the Investors Compensation Scheme and signed forms assigning claims to it. The forms reserved certain rights against the lending building societies, using wording about rescission and reduction of mortgage liabilities. A dispute arose over whether the reservation covered all claims against West Bromwich or left damages claims assigned to the scheme. Related issues concerned claims against solicitors and the validity of the assignment. The House of Lords considered preliminary questions about construction and entitlement to sue.

Which rights against the building society were reserved to the investors by the compensation form, and which had been assigned to the scheme when the wording was read in context?

The House of Lords majority allowed the scheme's appeal on the construction of the assignment. Read in context, the reservation protected the investors' rescission-related rights rather than retaining every damages claim against the building society. Lord Hoffmann explained interpretation through the understanding of a reasonable person equipped with relevant background available when contracting. Text remained important, but its contextual meaning was not necessarily identical to an isolated grammatical reading. Prior negotiations and subjective declarations were generally excluded from that interpretative exercise. The dispute concerned which claims had been assigned and who could pursue them, not a final determination that each investor was entitled to rescind a mortgage.

A contractual document is interpreted objectively in its relevant background, considering what it would convey to a reasonable person in the parties' position. The exercise identifies contextual meaning rather than undisclosed subjective intentions; it does not authorise unrestricted rewriting of an inconvenient bargain.

ICS is central to modern contractual interpretation and the relationship between text, context and commercial purpose. Its assignment dispute is important because it demonstrates the consequence of choosing between competing readings of awkward wording. Later cases refine the weight of language and commercial context, while Chartbrook maintains the general exclusion of negotiations. Keep interpretation distinct from rectification and implication of terms. The former identifies what the document means; the latter doctrines answer different questions about correction or additional obligations.