Can I get a UK Tourist visa if my US visa has expired?

I'm a South Asian who is in the US on a student visa. My visa has expired, which means that I need to renew my visa in my home country before re-entry.
I might need to go to the UK for an exchange. Can I get a UK visa within the US, if my US visa has expired? My plan is to go to the UK, and from there fly to my home country to renew my student visa before coming back to the US.
Best Answer
The pandemic situation notwithstanding, if your F-1/J-1 or another status is still valid, you will be able to apply visas inside the US for most countries.
For short-term visas, the UK does not require being a resident at all (but you should be legally present in the country you are applying from); however, it is recommended to submit a confirmation of legal residence to justify your personal circumstances. In any case, your I-94 (proof of legal admission) in combination with I-20 (proof of student status) should suffice. Expiration of your visa does not matter if your I-94 is still valid.
As you are aware, you will need a new US visa before returning to US after your exchange.
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What happens if your US tourist visa expires?
If you overstay the end date of your authorized stay, as provided by the CBP officer at a port-of-entry, or United States Citizenship and Immigration Services (USCIS), your visa will generally be automatically be voided or cancelled, as explained above.Can I apply for UK visa before my current visa expires?
How Far in Advance can I Renew my UK Visa Before it Expires? You can renew your UK visa well in advance of it expiring. It is generally stated that you can submit an application for a renewal or for a new visa at any time, and you don't have to wait for your current leave to come to an end.Does US visa rejection affect UK visa?
US refusal may not affect UK visa - The Economic Times.Is My Visa Still Valid If My Passport Has Expired?
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