A judge said that if a Muslim woman refuses to take off her veil in court to give evidence she should not be allowed to testify.
The woman must also remove her niqab in front of a female police officer or other witnesses for identification purposes.
Judge Peter Murphy said the woman must be given time to reflect when asked to take off her veil and added: "If she refuses the judge should not allow her to give evidence and must give the jury a clear direction."
He also said: "No tradition or practice, whether religious or otherwise, can claim to occupy such a privileged position that the rule of law, open justice and the adversarial trial process are sacrificed to accommodate it.
"That is not a discrimination against religion, it is a matter of upholding the rule of law in a democratic society."
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It will be cold and frosty across the north of the UK tonight, with some icy patches in the west.
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Temperatures are expected to rise today and tomorrow, with heavy rain expected tomorrow. Melting snow plus heavy rain could mean trouble.