I am travelling to India via London on 1Oct2012. My visa (h4) stamp has expired on 1Mar2012 but I have valid extension of stay I-797 document that is valid till March 2015. I need to apply for a UK Transit visa in order to transit London. I checked in the UK visa application requirements that we need to submit a valid passport and also a valid US visa. Do you know if UK can give a transit visa with the above information (expired h4b visa stamp)?