The annual DTI report on the development of the oil and gas resources of the UK is known in the industry as the 'Brown book'. This year's edition contains information on the UK upstream industry, with estimates of oil and gas reserves on the UK Continental Shelf (UKCS) and facts and figures on oil and gas exploration, development and production. It includes financial and economic information about the impact of oil and gas production on the UKCS and coverage of the offshore environmental regime. Appendices cover specific aspects of oil and of oil and gas development, such as licences issues, wells drilled, significant discoveries, oil and gas fields in production and under development, production statistics and expenditure by operators. There is a substantial section of coloured maps of oil and gas fields.