It's as it aims to reduce staff levels
The bank wants to bring its workforce down by 1500 by 2023 through retirements, natural exits and voluntary redundancies.
It will also leave a headquarters in Dublin by the end of the year and three more in the future, after analysing the impact of staff working remotely.
Financial Services Union General Secretary John O'Connell says the bank needs to engage with them on what plans are in place for staff working from home:
'If the bank are making savings in relation to their footprint in the city, they have to recognise that people are taking on a cost, by working from home, whether it's utilities or other costs that has to be recognised so that's part of what we want to engage with the banks on.'