I am a Ghanaian student studying in the US. I am scheduled to be travelling to Ghana via the UK. I have a 3 hour layover in the airport and then my flight for Ghana departs. I have a valid F-1 visa for the US so do I need to apply for a transit visa for the UK?
Short: A UK transit visa (formally a 'direct airside transit visa or 'DATV) is NOT required in your case as long as all your travel documents and visas as required for the US and Ghana are in order and you complete the transit within 24 hours.
Longer / Because:
You will not need to have a DATV to transit UK airspace because you meet the following conditions:
The above is obtained from the UK Border agency site - Do I need a visa to transit airside? which is the one that 'Solver' cited.
I get the opposite answer to him after reading:
You also do not need a DATV if the following applies to you: