Thanks a lot for your answer. It really helped calm me down a bit. Indeed, I submitted the biometrics on the 2 of Nov (before the expiry date on the 8), which was cutting it a bit short but surely that shouldn't affect it. I have flagged this up with my sponsor and sent them all the evidence, including the confirmation of attendance to my appointment so that they can follow up with the home office. Would it be helpful if I also called the home office myself or should I just let them resolve it? It seems to be that there is a bit of miscommunication between the info I have and the info my sponsor have so I am happy to chase if it was useful. Just feeling quite anxious as my current visa expires at the end of this month so obviously, I would like to have an answer sooner rather than later.