Hello. I hope someone will guide me here. I am currently on Tier 4 - Doctorate Extension Scheme visa. My visa is expiring on January 30 2018. One employer is ready to sponsor me as I had interview with them today. They are already on Tier 2 sponsorship list but the HR doesn't know much about Tier 2 visa (a small company with 40 permanent staff). I told them i am willing to pay for my visa and other costs if they issue me COS certificate. Does anyone know here if I would be able to get that quickly if she applies for it next week? Also, I am switching from Tier 4 to Tier 2 which I assume that I don't have to pay for Immigration Skills Charge (ISC). I read somewhere that Home Office issues COS on 11th of each month. If that's true then what's the best possible course I should take to make sure that I get the COS quickly? I also want my wife to apply with me and she is currently on Tier 4 dependant visa with me in UK. Can she apply on the same COS with me or she has to apply for another COS? Help please