Two contractors working on Britain’s TSB Bank computer systems said that “rushed and inadequate testing and poor internal communication” is the reason for 1.9 million customers not being able to access their accounts.

Last weekend, TSB customers reported not being able to make mortgage and bill payments within hours of the migration.

The IT contractors revealed to Reuters that testing of the different systems was not as thorough as it could have been because TSB rushed as it neared a self-imposed deadline of November 2017, which was later extended to April 2018.

Both testers also revealed that tests were, in some cases, badly designed or rushed in order to meet the initial project launch date.

TSB wrote in a blog post: “We’re sorry, we know some customers are having issues using the mobile app and our Business Banking Authentication app and are seeing a ‘Something went wrong’ message when they try to log in.

“Please try closing down and relaunching the app – you may need to repeat this a couple of times. We’re working hard to fix this.”

The retail and commercial bank further said that it will cancel overdraft fees for the month of April, as well as increase interest payments to savers.

The bank has also hired IBM to fix its software issues, putting the idea of insurance to the test.

Written by Leah Alger