You’re riding slowly in a town centre. Why should you glance over your left shoulder before turning left?

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You're riding slowly in a town centre. Why should you glance over your left shoulder before turning left?

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When riding slowly, you must remember to look out for cyclists – they can travel quickly and fit through surprisingly narrow spaces. Before you turn left in slow-moving traffic, it’s important to check that a cyclist is not trying to filter past on your left.