The Transitional Phase ends at the end of 31.12.2020. From this point in time, British citizens won´t be treated as EU-citizens anymore.
For this reason we updated our frequently asked questions (FAQ).
During the year 2021 British citizens and their families who are residing in Germany according to the Withdrawal Agreement will receive the Aufenthaltsdokument-GB when their notification of residency occurs on time.
Please check our detailed informations here.