US company Omnicom and French firm Publicis say they are combining in a "merger of equals" that will create the world's largest advertising firm with a value of more than $30 billion (£20bn).
The combined company will be called Publicis Omnicom Group and be jointly led by Omnicom CEO John Wren and Publicis CEO Maurice Levy as co-chief executives.
More top news
Taking money from the rich to give to the poor is a debate as old as Nottingham's mythic son, so why are people still so divided on welfare?
An unsettled weekend of weather is in store as conditions turn wet and windy from the west tonight.
Seventy pupils at the Grange School in Runcorn were held in isolation for refusing to remove Marie Curie daffodils from their blazers.