My wife (Iranian) and I (German) will travel from our home in the US to Germany and then to the UK for a vacation. She got issued an EEA family permit to accompany me to the UK. As I will go to Germany a few days before her, she will fly BOS - LHR - FRA by herself. Will she still need a UK transit visa for her 5 hour layover (move from terminal 3 to 2), as the EEA family permit says "to acc. ~name of spouse~"?
Thanks for your help!