The preparation of the Group’s consolidated financial statements requires management to make judgements, estimates and assumptions that affect the reported amounts of revenues, expenses, assets and liabilities, and the accompanying disclosures, and the disclosure of contingent liabilities. Uncertainty about these assumptions and estimates could result in outcomes that require a material adjustment to the carrying amount of assets or liabilities affected in future periods.

Estimates and assumptions

The key assumptions concerning the future and other key sources of estimation uncertainty at the reporting date, have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year, as described below. The Group based its assumptions and estimates on parameters available when the consolidated financial statements were prepared. Existing circumstances and assumptions about future developments, however, may change due to market changes or circumstances arising that are beyond the control of the Group. Such changes are reflected in the assumptions when they occur.

Provision for land and site works

The provision for land and site works, outlined in Notes 4.3 and 17, recognises the Group’s estimated contractual obligation to prepare the land ready for development. Cost estimates have been based on advice provided by qualified specialist consultants using preliminary designs which are not yet approved for construction.

There is a significant level of uncertainty about the final quantum of these costs, along with the timing of the economic outflow.