Brexit and MiFID transaction reporting
Firms and connected persons, for example Approved Reporting Mechanisms, should take reasonable steps to comply with the changes to their regulatory obligations by exit day on 31 October.
Firms that are not able to comply fully with the regime at the time of the UK’s withdrawal from the EU will need to be able to back-report missing, incomplete or inaccurate transaction reports as soon as possible.
See Market Watch 61 here.