You must always signal left before you exit a roundabout, even if you’re just going straight through. It's the law. Signalling left as you're exiting shows people your intentions and helps keep everyone moving efficiently. The person in this example does it perfectly – well done to them! For example, if you're travelling straight through a roundabout, signalling left before you exit shows people waiting in front of you that you're exiting and that it's safe for them to enter the roundabout. Ther