Following the end of the Brexit transition period, as of 11pm on the 31/12/2020 ESMA has removed all instruments listed only in the UK from their FIRDS database.
All instruments listed only in UK, which were still active, were terminated in ESMA FIRDS published on 04/01/2021.
Control Now has analysed the ESMA delta files - this accounted for around 7.8 million unique ISINs terminated on 31/12/2020 – compared to 8-10k unique ISINs terminated on a last day of 2019 and 2018.
Please find ESMA statement regarding FIRDS update and Instrument Coverage in FCA FIRDS.