Drivers are not allowed to drive in a bus lane, unless:
they are driving for up to 100 metres to enter or leave the road, e.g. to turn at an intersection
they are overtaking a vehicle that is turning right or making a U-turn from the centre of the road
the information on the bus lane sign shows that other vehicles can use the lane
they need to avoid an obstruction, e.g. a broken-down vehicle
they are driving a public bus or coach
they are riding a bicycle.