Strike dates are yet to be decided.
Employers have previously said universities have done their best to support staff in tough times.
Students - some of whom have supported previous strike action by university staff - could face lectures being cancelled or rearranged.
The Universities and Colleges Employers Association (UCEA), which represents university employers across the UK, proposed a 3% pay increase for staff this academic year, with 9% for those on the lowest pay grades.

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