Thanks for your advice.
I have now been granted a Tier 4 (General Student) visa.
My partner is applying for his separate Tier 2 (Intra-Company Transfer) visa as well.
Will I be able to switch to be his dependent from inside the UK at a later date? I understand this now may be possible due to a switch in immigration rules as applicants formerly had to leave the UK and apply from their home nation.
Thanks so much.