Inside Europe - A tussle at the heart of Turkish politics

There's been a dramatic turn of events in Turkey with the country's Prime Minister, Ahmet Davutoglu, paving the way for his departure from power. For months a crisis between President Erdogan and Davutoglu had been rumoured and now it has come to fruition, But why now exactly? Our correspondent Dorian Jones is in Istanbul and has been following what's going on.