I just finished my PhD and will be starting a postdoc in the US in September. I will be visiting the UK for 2 months for a research visit. My entire trip is covered by the professor, but while filling up the UK visitor visa form, they ask if I am a student/unemployed?
I don't mind putting in student, but later they ask me to provide a letter from my employer stating that I have permission to travel to the UK (this doesn't really apply to me). Is this letter necessary for the visa application process? Every other document of mine is perfect and ready!