I am a EU citizen in a relationship with a US citizen, legally in the UK under a Student Tier 4 visa. His Visa is valid until 2015.
We are getting married on the 3rd December. We have given notice as necessary and have been given the all clear.
My question is: will his Student Visa remain valid after our marriage? We may or may not want to apply for a Spouse Visa as we may leave the UK at the end of his university Degree, but I am not sure if we HAVE to apply. Will he be able to leave and re-enter the UK for holidays after our marriage?
Thank you very much for your help and time.
It is much appreciated!

Valerie