Hence the main point of my question, what freight is shipped to UK and Europe
Having operated those flights personally, I can say that the majority of freight being flown in coming from China is PPE for the NHS and medical Equipment from India for the NHS (There's a pandemic going on after all). Tropical fruit stuffs from SE Asia and Africa (UK needs food still). Electronics from Hong Kong and Vietnam (People are bored in lock down because of said pandemic). May not be much direct from the UAE, but love them or hate them, EK have a considerable cargo hub in Dubai where the wide reach of their network allows to have their freight consolidated there and flown out to other parts of the world - including the UK. You'd probably expect more flights to arrive as the AstraZeneca vaccine is manufactured just outside of Mumbai in Pune. As manufacturers scale up production, output logistics has to follow.