On 6 January 2021, the European Securities and Markets Authority (ESMA) published its first set of Financial Instruments Reference Data System (FIRDS) files following the end of the Brexit transition period.
ESMA states that the FIRDS delta files contain information about:
- Termination of all UK financial instruments: (ISIN, MIC) records for MICs in the UK and which were still active have been terminated and their termination date has been set to 31 December 2020 at 22:59:59 UTC.
- Updated Relevant Competent Authority (RCA) for all financial instruments which previously had GB as RCA and which will continue to be traded in the EU.