PPG 16 has resulted in an explosion in archaeological fieldwork in the UK. Developer funding has led to dozens of archaeological organizations competing for work along with archaeological consultants working for developers to oversee projects. This has contributed to the growing professionalization of archaeology from its more "ad hoc" earlier incarnation as Rescue archaeology. Also, a wider variety of archaeological methods are now employed including surveys of large areas for the purposes of Historic Landscape Characterisation, deposit models and the production of regional archaeological research agendas.