Warm weather triggers algae burst

The recent spell of warm weather has triggered a burst of algae on the surface of the lake at St James's Park in London.

Even the ducks appeared to be struggling to paddle their way across the water in the London park because of the sudden bloom of spirogyra.

According to park staff who have been monitoring the situation, the blanket weed floated to the surface when it became hot and sunny and will now be raked over and removed.

A spokesman for the Royal Parks said the algae was not an unusual sight during the summer and its presence indicated clear water in the lake.

She said: "It thrives in bright, warm conditions and it's a good indicator of clear water.

"Last year we cleared the lake and removed the silt that had built up on the bottom so the water is in very good condition."