Yes, there are travel restrictions between the UK and Germany. These restrictions were put in place to help prevent the spread of COVID-19.
The restrictions vary depending on which country you are travelling from and to. For example, if you are travelling from the UK to Germany, you will need to have a negative COVID-19 test result before you can board your flight. You will also need to fill out a health declaration form and show it to border control when you arrive in Germany.
If you are travelling from Germany to the UK, you do not need a negative COVID-19 test result. However, you will need to fill out a health declaration form and show it to border control when you arrive in the UK.
There may also be other restrictions in place depending on your individual circumstances. For example, if you have been in contact with someone who has COVID-19, or if you have symptoms of the virus yourself, you may not be allowed to travel.