I am traveling to India via London from USA. As i am traveling through multiple airlines, i have a 2 hrs stop at Heathrow airport London for a connecting flight. I am going for my H1 visa stamping to India, but i have a valid F1 visa till JUN2012. In this situation should i take a transit visa to fly through London. Are they checking for a stamped visa only or the supporting documents as well? Are they checking I-20 if we are traveling with F1 stamped visa. I am getting confused with all these questions, Please help.
Thanks in Advance.