Historically, when a lease ran out the property held thereunder would revert to the possession of the landlord/freeholder. In this case, the job of the leasehold valuation tribunal was to hear evidence from both sides as to what the long leasehold value of such a property would be and to determine what proportions of the value of the said property should rightfully be ascribed to leaseholder and the freeholder under the legislation. Generally, such evidence was given by an expert witness for each side who will argue that a particular value is more applicable based on an analysis of recent sales of comparable properties around the date that the Leasehold Notice was served.