CA 13 March 1987. An appeal by Fairview Estates, from a decision in favour of the present respondents, estate agents Brian Cooper and Co. The respondents claimed to have earned commission by the introduction of a company as lessees of an office building. The respondents were the first to introduce the company which eventually completed the lease, but there was a point where the company ceased looking for a property and when the company renewed their interest, they were introduced to the property by a different firm of agents. Although the judge found that the effective cause of letting was through the introduction by the second firm, this did not disentitle the respondents to commission. The defendant lessors appealed. The lessors submitted that the authorities on estate agents' commission established that entitlement was always subject to an implied term that the agents must be at least an effective cause, if not the effective cause of the transaction.