The education secretary has been accused of "making light of violence in schools".
Unison is at odds with the National Education Union in a dispute over school support staff.
Corbyn ally Roger McKenzie has been referred to the party over an alleged breach of rules, which he denies.
Matt Hancock pledged those who lost loved ones on the NHS or social care front line would get £60,000.
Despite working through Covid-19, staff employed by ISS get lower wages, less holiday and less sick pay than their NHS counterparts.
Critics say union block votes are creating 'unfair' system
Now PM backs Bill to protect 999 staff from assault