Officially we are still awaiting UK / EU arrangements regarding financial services to be finalized (probably by the end of October).
Unofficially we have been preparing for more than a year for all Brexit scenarios. So when the UK /EU announce their final decision, we will be ready to deploy the respective business continuity plan and act accordingly.
In a nutshell: no worries at all - everything is well planned & organized on our side: your investments are safe while using our service. Needless to say, we will inform you within the due course.