Anne McElvoy talks to David Edgar about his new play 'If Only' which focuses on The Coalition Government. Composer Orlando Gough tells us about his role in a one-off-art event celebrating the UK's long-silent foghorns in the north-east of England. Geographer Danny Dorling explains why he believes the predicted population explosion won't happen and even if it does, we might just cope, with Nick Bostrom in discussion. And Adam Broomberg discusses his works with Oliver Chanarin and why their concern is mistrust of the images which saturate our lives.