Signs warning people not to swim are in place at almost all of England’s official river bathing sites due to concerns the water could be unsafe.

It comes as the government announces six new river bathing sites will be monitored for the first time this summer, including a first location on the River Thames in London.

In the last week the BBC has visited all the 14 existing inland river locations which were tested by the Environment Agency last year for contamination from bacteria linked to human and animal faeces.