Cancer screening, the Windrush Generation, Audiograms

(0:32) Breast screening – the Numbers: 450,000 women have accidentally not been invited for breast cancer screening(07:26) Counting the Windrush Generation: What do we know about those who might be lacking documentation(11:15) Has Nigel Farage been on Question Time too often? We chart his appearances over 18 years(16:32) Painting a picture with an audiogram: Data journalist Mona Chalabi talks about her unusual approach to analysing numbers. Presenter: Tim Harford Producer: Charlotte McDonald Editor: Richard Vadon