A Welsh school teacher has five sets of twins among her 20 pupils.

All live within a mile of each other and were born in the same six months, reports the Daily Mirror.

Three pairs of twins are identical causing teacher a real headache in her Flying Start nursery group at Pembroke Dock Community School in West Wales..

She said: "There must be something in the water. I've never heard of five sets of twins in a class."

"It was quite a shock when they first arrived for school. It was like we were seeing double."