hyperopia, I believe the simple explanation for the change in language is due to Brexit. Up until 12/31/2020, the UK was part of the EU (European Union). So, NWBio could refer to all the EU, including the UK, collectively as the “European region”.
However, once the UK separated from the EU due to Brexit, effective 1/1/2021, the UK was no longer part of the EU. As a result, NWBio had to refer to the UK by itself, separately from the European region.
Also, other countries outside of the EU, but are in the area, like Switzerland, can be referred to as in “other regions. So, although Switzerland is in Europe, they are not in the EU. But, because Switzerland is 1 of the 6 participating Project Orbis countries, SwissMedic can still approve DCVax-L through the Project Orbis program. And, the Switzerland market can be serviced through Sawston, unless SwissMedic gives NWBio different requirements.