Thousands of customers were unable to withdraw cash or access their accounts after a software upgrade on 19 June.

BBC: Ulster Bank crisis: 'Several thousand' customers leave

Thousands of Ulster Bank customers were unable to withdraw cash or access their accounts after a software upgrade on 19 June.

BBC: Education Committee

Thousands were unable to withdraw cash or access their accounts for weeks after a software upgrade on 19 June.

BBC: Ulster Bank says ?18m paid out so far in compensation

Customers were unable to withdraw cash or access their accounts for weeks after a software upgrade on 19 June last year.

BBC: Ulster Bank logo