How far will immigration levels fall once the UK leaves the EU?

Immigration was clearly one of the central issues in the EU referendum. But what happens next? How far will immigration levels fall once the UK leaves the EU? It could depend on whether the UK stays within the single european market. The price for that could be continued free movement of labour. Stephen spoke to Former Tory MP and Minister Edwina Currie, businessman Irwin Armstrong and TUV Councillor Henry Reilly, formerly of UKIP