1)What was the weather like in London?
2)Who did you go to London with?
3)where did you stay in London?
4)What places of interest did you visit?
5)what kind of food did you eat?
6)what did you buy in London?
7)Did you go to London just for fun or to study/work?
8)Did you like it in London?
9)Would you like to go back ?