Thames Water has carried out water quality tests after dozens of people reported being sick with vomiting and diarrhoea in Beckenham.

Among those were a four-year-old boy and a woman who were reportedly struck by a stomach bug, as reported by the Guardian.

The boy suffered days of vomiting, and the woman was so unwell she went to hospital with stomach pain, vomiting, and dehydration.

Katie Cox, a TV producer who lives in Beckenham, told the Guardian: “I was unwell two weeks ago with what I thought was a stomach bug.

“It was a good week before I was able to eat again properly.

“Since then, the South West Water contamination has come to light and I became concerned that maybe there is something in our water.”

Thames Water collected samples from the Central Sydenham water zone after concerns were raised by customers.

The water company confirmed that there were no issues with the supply found in laboratory tests.

A spokesperson for Thames Water said: “Our technicians collected samples from a property in the area on May 22 following a customer contacting the business.

“Initial on site testing carried out by our accredited technician did not indicate an aesthetic issue with the water, further samples were also collected for laboratory analysis and results showed no concerns.”

Elsewhere in England, on May 14, unsafe drinking water led to more than 100 cases of waterborne disease in Brixham, Devon.

Cryptosporidium, which can cause symptoms such as diarrhoea and vomiting, was detected in the water supply.

Households and businesses were told by South West Water not to use their tap water for drinking without boiling and cooling it first.

The spokesperson for Thames Water added: “We carry out regular sampling at the local works, reservoirs, and across the whole of our supply area on a routine basis which verify the excellent quality of the drinking water we supply.

“We take the quality of our water extremely seriously – it is the highest quality drinking water in the world – and since 2010 more than 99.95% of tests taken from customers’ taps met the standard required by UK legislation.

“Every year we carry out more than 500,000 tests, taking samples from source to tap.