Peter Day's World of Business

Last year, the UK became the first place where spending on digital ads exceeded that spent on all other forms of advertising combined. In this new world, what are ad agencies doing to square up to the challenges they face? Management Today's Matthew Gwyther presents. The producer is Nina Robinson.(Image: A visitor looks at old posters advertising various chocolate products at the Belgian Chocolate Village museum. Credit: EMMANUEL DUNAND/AFP/Getty Images)