Important Note:

As you will now be aware, the UK formally left the EU on 31 January 2020; however, the Government has agreed to a transition period with the EU that will last until the end of 2020. 

During this time, all EU law, rules and regulations will continue to apply in the UK between the UK and the EU. This means that you  will not require Green Cards when driving to the EU, the EEA, Switzerland, Serbia or Andorra at this time.