A Charedi primary school has written to the mother of one of its pupils asking her to "respect the school", after she wore a skirt that fell above her knees.

Rabbi Ephraim Klyne, the principal of the Avigdor Hirsch Torah Temimah boys primary school, wrote to the mother - who wished to remain anonymous - saying that "at hometime on Wednesday 17 June, I was dismayed to note that the length of your skirt left your knees exposed".

He continued: "Mothers are expected to respect the school through adhering to the dress code.

"Further, it undermines the ethos of the school when parents see others unsuitably attired."

The principal enclosed a copy of the school's dress code, which he reminded the mother she had signed on her son's entry to the school.

The letter was made public this week, after the woman's husband posted a copy to the Facebook group "I'm also fed up with the way women are treated in Orthodoxy".

When contacted by the JC, the family refused to comment.

Rabbi Klyne said: "The school has a dress code for pupils, which is mandatory, and a preferred dress code for parents, which the school encourages."

The school, in Dollis Hill, north-west London, states in its admission criteria that priority is given to families who abide by the shulchan aruch (the code of Jewish law) and who conduct themselves according to a book entitled Modesty: an Adornment for Life Day by Day by Gateshead rabbi Eliyahu Falk.