This interactive map has been produced by NSTA to assist companies and members of the public with information that will help understand oil and gas exploration and production activity onshore in Great Britain. Some features have been simplified for optimum web display.Petroleum Exploration and Development Licences (PEDL’s) and older licence types (AL, DL, PL, ML, EXL) grant exclusive rights to search and bore for, and get, petroleum in specific ordnance survey blocks. PEDL’s cover the various stages of the full development cycle of oil and gas exploration, appraisal; production and eventually decommissioning of the wells, however a PEDL licence grants no automatic permission for drilling or facilities siting and construction. Permission to carry out such activities will be dependent on planning permission from the relevant Local Authority. Developers also have to secure relevant permits from the Environment Agency, and their plans have to pass scrutiny by the Health and Safety Executive.