Claimants include family of 11-year-old girl who spent three weeks on dialysis after eating chicken salad sandwich

Tesco and Asda are being sued by customers, including the family of an 11-year-old girl, who were left seriously ill after eating own-brand sandwiches linked to an outbreak of E coli.

The supermarkets face legal action after a child and adult were left in hospital. One person has been confirmed to have died and more than 120 others including a six-year-old have been hospitalised in the UK due to the bacteria.

Water quality testing by campaigners shows levels up to 27 times acceptable limit for bathing as rowers told to take precautions

Harmful E coli bacteria have been found at very high levels at Henley, days before elite rowers compete in the international regatta there.

Water quality testing in the Henley Mile, part of the regatta course outside the Oxfordshire town, has revealed mean levels of 1,213 E coli colony forming units (CFU) per 100ml of water, across 27 tests. Where E coli levels are above 900 CFU/100ml, the water quality is deemed poor, according to bathing water designations, and is a threat to public health.

Death in England linked to outbreak by officials, who say lettuce is the likely source of the illness

One person has died and more than 120 others including children as young as six have been hospitalised in the UK amid an E coli outbreak linked to lettuce.

Two people in England died within 28 days of infection with shiga toxin-producing E coli (Stec), the UK Health Security Agency (UKHSA) said in a briefing on Thursday.