Corporate Natural Capital Accounting, a new monitoring framework, was applied to some National Nature Reserves (NNRs) to assess whether it is an appropriate tool and useful source of information for their management. Initial accounts were developed for a plan to deliver a long term goal for each NNR. They comprised long term projections of costs, ecological indicators, environmental goods and services provided by the NNR and their value. Reporting against the initial accounts in future would monitor progress (it was not feasible for this study).