This letter explains that your biometric are valid till next 10 years.Yes, it provides the validity of my biometric information. But the date of the letter is updated, as well as the correspondence address when compared to the letter from the last year. I thought it was normal, as communication that my biometrics information is valid for my new application. Is it not?
How do you know only the first applications get the letter?
Mostly, students don't get this letter if they apply visa for second/more times, they already have this letter when they apply last time