The plaintiffs employed the defendants to construct a tunnel in the English Channel.
Clause 67 of the contract provided settlement of differences during the progress of the works, by a panel of experts (not arbitrators) and final settlement by arbitration in Brussels under the rules of Conciliation and Arbitration of the International Chamber of Commerce.
Clause 68: the construction, validity and performance of the contract shall in all respects be governed by and interpreted with the principles common to both English law and French law, and in the absence of such common principles by such general principles of international trade law as have been applied by national and international tribunals. Subject to the French and English public policy provisions
On the ground of lack of payment the defendants threatened to suspend works, the plaintiffs look for an injunction to continue working.