A flood alert has been issued following heavy rain.

The alert has been given by the Environment Agency for the Upper River Colne and Radlett Brook.

It covers Borehamwood, Radlett, London Colney, and Colney Heath.

Properties are not expected to be impacted but there could be flooding on land and roads near to the river, the agency has warned.

Hertfordshire Fire & Rescue has urged people to avoid walking, cycling or driving through floodwater.

A statement published this morning (November 17) by the Environment Agency said: “We have seen heavy rainfall across the area overnight into Thursday 17 November.

“This has caused the Upper Colne at Colney Heath to rise. River levels have now peaked and are dropping down again.

“There is likely to be flooding to low lying land and roads close to the river tonight and into tomorrow morning. Flooding from surface water, where water gathers and flows off road surfaces, could also occur. No flooding to properties is currently expected.

“Avoid walking, cycling or driving through flood water. We are constantly monitoring river levels and have staff on standby to attend to any blockages in the river.

“We expect to remove this flood alert by this evening.”