NHS workers offered 1.4% interest rate via new savings account - eligibility rules in full

This means Principality can change the rate, and it could go up or down.

The 1.40 percent rate was correct on June 1, 2021, the Society said.

"If you have £100 or more in the account, we will give notice of any reduction in interest rates at least 14 days before the change takes effect," the Society says.

Those opening the account, be it the Thank You Online Saver or the Thank You Saver, will need to provide proof of their address and identity.