London Arbitration 2/18 give us an interesting issue on causation arising out of two related contracts, a cfr sale contract, and the charterparty made by the seller. The cfr sale contract required buyers to pay charterparty freight to sellers as soon as possible after signing bills of lading; which they failed to do. The shipowners refused to release the ‘freight prepaid’ bill of lading until freight had been paid. The consequent delay resulted in the seller incurring a liability for demurrage at the discharge port under their charterparty. The tribunal held that the sellers were not entitled to an indemnity from the buyers in respect of their demurrage liability. Despite the provisions of the sale contract, the primary obligation to pay to the owners the charterparty freight remained with the sellers, as charterers of the vessel. The sellers decided not to pay themselves the freight due to the owners and this broke any chain of causation there might have been between the buyers’ breach and the demurrage incurred by sellers under the charter. Alternatively, the sellers had failed to mitigate the damages to which the buyers’ breach exposed them and thereby incurred a liability for demurrage that could have been otherwise avoided.