等到1月31日在英國境內申請BNO VISA, 香港個TB TEST仲 valid 嗎?
段文字好似寫到要再去英國指定診所做TEST咁... 唔知有冇理解錯?

Guidance
Tuberculosis testing in the UK for Hong Kong BN(O)
Published 22 October 2020
Contents
Visa Medicals
Northern Visa Medicals
You must be tested for tuberculosis if all of the following apply:
you’re in the UK
you’re applying for the Hong Kong British National (Overseas) visa
you did not provide a TB test certificate when you last entered the UK, because the duration of the visa you applied for was 6 months or less or you applied to enter the UK at the border