which incorporate a number of assumptions, including a prudent level of future uncontracted revenue in the forecast period. In arriving at a judgment in relation to the recognition of deferred tax assets, management considers the regulations applicable to tax and advice on their interpretation. Future taxable income may be higher or lower than estimates made when determining whether it is appropriate to record a tax asset and the amount to be recorded. Furthermore, changes in the legislative framework or applicable tax case law may result in management reassessing the recognition of deferred tax assets in future periods. 4 Segment information The principal activity of the Group is the operation of a professional football club. All of the activities of the Group support the operation of the football club and the success of the first team is critical to the on-going development of the Group. Consequently the Chief Operating Decision Maker regards the Group as operating in one material segment, being the operation of a professional football club. All revenue derives from the Group's principal activity in the United Kingdom. Revenue can be analysed into its three main components as follows: