St John’s Catholic Primary School and the Grange Community Primary School in Banbury have fully closed today (Thursday, January 11).
The schools, which are next door to each other in Avecot Way, have both suffered from issues with their water supply.
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A statement on the Grange Community website said: “We have just discovered that we have no water at school – the reason unknown as yet.
“As a result, school will not be able to be in session today.
St John’s also has “no running water”, according to Oxfordshire County Council’s website.
Five Acres Primary School in Ambrosden, a village near Bicester, has partly shut today after a double boiler failure.
Reception and Key Stage 1 are closed while nursery and Key Stage 2 remain open, the council’s website said.