Sound the a-llama! More than a dozen alpacas go for a walk along a busy A road - causing panicked motorists doing 70mph to brake and swerve

Drivers did a double take after spotting a herd of alpacas walking along a busy 'A' road.

The woolly 4ft tall South American creatures escaped from a Cambridgeshire farm and trotted on to the A1307 dual carriageway, causing panicked motorists driving at 70mph to brake and swerve.

Cathy Booty was passenger in a car being driven by husband Richard when they were confronted by the herd of more than 20 alpacas near the Hemingford Abbots turn-off yesterday.

'They scarpered back off the road when a woman got out of her car and started walking slowly towards them' said Mrs Booty, of Godmanchester, Cambridgeshire.

'My husband was worried they'd jump the reservation and join the other carriageway' she said.

'People were driving slowly through the herd, as they are heavy animals and they could cause some damage.

'It looks like their field was adjacent to the road. They had come a decent distance from the field to find their way to the road.'

Cambridgeshire Constabulary confirmed officers were called just before 2pm but by the time a patrol got there, the farmer had herded them back into their pen.

A spokesperson for the force said: 'We were called at about 2pm yesterday with reports of alpacas in the road on the A1307, Hemingford Abbots.

'Officers attended but the animals had already been secured back in their field.'