Source: Bank of England  

Release: SONIA Interest Rate Benchmark  

Units:  Percent, Not Seasonally Adjusted

Frequency:  Daily

The Sterling Overnight Index Average (SONIA) is the interest rate applied to bank transactions in the British Sterling Market during off hours. This series represents the SONIA rate occurring at the 25th percentile of volume.

For more information, please visit the Bank of England's explication on the key features and policies of SONIA.