Many pupils in a primary school were told to self-isolate after an outbreak of Covid-19 cases, as Hertfordshire County Council has issued a Covid warning in Three Rivers.

Little Green Junior School has confirmed that “a number of pupils” from the school have been told to self-isolate this half-term holiday after positive cases of Covid-19 were identified at the school.

While the school has not provided an exact number of cases found from the outbreak due to confidentiality reasons, a parent has suggested that ’50 per cent’ of a class tested positive – a figure that is unconfirmed.

It is understood that many parents from the affected groups have also tested positive with the virus.

On the seven days to May 29, there has been nine cases in Croxley North and Sarratt – where the school is located.

In Three Rivers in general, a high cluster of positives was found with children aged 10 to 14 between May 27 and May 29.

Government figures also shows some children aged five to nine in Three Rivers also tested positive on May 29.

On Thursday (June 3) there were six new positive cases found, however the age demographics have not been specified.

The rising case rates in the Three Rivers area triggered Hertfordshire County Council to issue a Covid warning.

A spokesperson from Little Green Junior School said: “I can confirm that following government guidelines and with support from our local public health team we have asked a number of pupils from our school to self-isolate before returning to school. This is a scenario we have prepared for and unfortunate as it is, we always put the safety of our pupils and whole school community first.

“It’s helpful that so many of our families have followed the advice around testing household members with symptoms, this will help to reduce further outbreaks at the school. We cannot give any further details as all data is confidential, but we hope all of our students remain safe and well and look forward to welcoming them back when we can."

Meanwhile Cherry Tree Primary School at Berry Avenue in Watford had to shut before the half-term following after a number of coronavirus cases identified within the school.

The decision to shut the school was following the guidance from public health experts.

But following the self-isolation week this half-term, Little Green Junior School expects to reopen next week - as per public health advice- with only the pupils told to self-isolate remaining at home.