http://westfield — changes in the political or economic environment; — industrial disputes which may delay projects and/or add to the cost of developments; — construction costs of a project which may exceed original estimates or available financing; — temporary disruption of income from an existing shopping centre which is being redeveloped; — failure to maintain leased rates for existing retail space, the inability to lease new retail space, rent abatements, and termination of lease agreements and pre-sale agreements; — loss of consumers due to inconvenience caused by construction; — incurrence of substantial expenditures before the redevelopment project produces income; and — delays due to inadequate supply of labour, scarcity of construction materials, lower than expected sales productivity levels, inclement weather conditions, land contamination, difficult site access, objections raised by community interest groups, environmental groups and neighbours, slow decision-making by counterparties, complex construction specifications, changes to design briefs, legal issues and other documentation changes.