UK visitor visa expired
I am a medical doctor. I have already taken 2 exams in the UK to work as a doctor there. I just have one more exam to take. I hold a visitor visa, which expires on 29/12/2017. However, I have booked the exam date on 23/01/2018.
I'd like to ask if it is possible to apply for a new visitor visa before my old one expires. Because the dates are quite close to each other as I don't want to miss the exam.
What can be the best option for my situation?
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