Annual official statistic measuring the volume and value of domestic overnight tourism in Britain. Jointly sponsored by Visit England, Visit Scotland and Visit Wales. Publication schedule for monthly results is at http://www.visitengland.org/Images/Continuous%20surveys_2013_v7_tcm30-32182.pdf
All current survey deliverables (including online data browser) are at http://www.visitengland.org/insight-statistics/major-tourism-surveys/overnightvisitors/index.aspx