The MENE survey has been running since 2009 and is currently the best and most representative source of visitor data currently available. Greenkeeper is based on this data, using this insight into people’s past behaviour as a reliable indicator for future behaviour. The model we subsequently developed has then been validated using other sources of visit counts, including mobile phone data, Royal Parks and local authority information. Fundamentally therefore the predicted visitor numbers are based on people’s actual decisions, not on hunches around what any of us may think happens.