just the fellas can answer? Anyhow, YES you do need a transit VISA, to go via London. However, no one actually looks at it at the London airport (well they didn't when I was there!) But if you are coming through the same route they will not confirm your ticket unless you have that visa on ur passport. My suggestion, get it. Either here or in Nepal... you would have to get it anyhow, if you are planning on coming back. Have a nice trip!