Travel costs and admission fees are added together to provide the yearly flow of benefits from
the outdoor recreation provided by UK freshwaters. Due to lack of data on capital inputs, gross
benefits are calculated and therefore no resource rent ratio is applied. However, it is recognised that
there are a number of costs related to outdoor recreation provided by freshwaters that should be
deducted, for instance the roads and car parks which allow visits to take place. It could be argued
that some of the capital inputs or wages might be reflected in admission fees. This is an area for
further research.