Hi there,
I am an International Student myself so we do have different requirements regarding attendance, etc.
But the fact that you have been informed that you cannot leave the UK during term time is odd. Especially that it's only two days and us, international students, have a bigger stuggle when it goes to travelling abroad during winter break.
I would advise you to reach out to your university's International Team as well as speak to you course leader or director and ask for their opinion. Surely if you are a great student with great attendance this shouldn't be a problem.
I hope I managed to help!
Best of luck,
Melanie
LSBU Rep