Students will be banned from refusing speakers a platform at their universities under the first government intervention on free speech on campus for 30 years.

Sam Gyimah, the universities minister, will announce tough guidance on the issue at a meeting today, calling attempts to silence debate “chilling”.

He will accuse some student societies of “institutional hostility” to certain unfashionable but perfectly lawful views. A “murky” legal landscape, with guidance from various regulators, lets zealots censor those with whom they disagree, Mr Gyimah will say.

The new rules signal the seriousness with which the government is taking free speech on campus. The previous universities minister Jo Johnson said last year that the Office for Students, the new university regulator, would enforce existing measures.

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