Members of Unite union working in Bromley Central Library are set to ballot today (April 30) for strike action, amid proposals from employer GLL to amend working hours.
The 17 staff will vote on a potential strike after proposals were made to increase the number of late shifts for both permanent and part-time staff.
It is understood that under the new proposals, staff would be expected to work four late nights every two weeks - a rise from the current one late shift every two weeks.
Part time staff are understood to have been asked to work one late night a fortnight, but currently do not work late shifts.