The issue of immigration was a subject that was at the centre of the Brexit referendum campaign but has been a little quieter in the general election. The BBC's Economics editor Kamal Ahmed and BBC Business editor Simon Jack look at the impact changing levels of immigration could have on the economy. Is there any evidence that immigration leads to low wages? And are there enough skilled people coming into the country to keep businesses and industry expanding? They are joined by the technology entrepreneur Martha Lane Fox who has been a digital champion under both Labour and Conservative governments. Show less