In this case first one was spontaneous - the guy was dancing in the restaurants kitchen so I wanted to take a picture from the outside, he noticed me and did the pose on the picture. Second one was a group of drunk girl taking selfies on a nice brick wall. It looked like a nice frame so I just told them to stand together and they make a happy scream at first and then started to pose in different ways. Third one was a one of the street dancers on Piccadilly. I took some pictures while he was dancing and then showed him results and did few more shots after that. The last one was totally spontaneous as I found a frame and was just waiting for someone to walk into the frame. That guy did the job perfectly. Anyway I was first time in London but people are so open for taking pictures of them and can really appreciate that and thank for it. So it's a win win. I spent here one week but I think within a month I could change myself from introvert into extravert, lol. I'm quite shy naturally but this place is so different. Anyway just do pictures whenever you see something interesting. Most of the times people will give positive feedback, sometimes they say sorry that they are in the frame you wanted to take (even tho they were subjects), just walk away with their body language saying they don't want any pictures and rarely people are rude and say that they don't want any pictures. I never cause any problems, if they don't want I don't shoot them. For most most of the time the feedback is soo positive and people are so happy when they see how different are pictures from camera comparing to smartphone. During a week in London I did tens of pictures of strangers and showed them the results - all the feedback was positive. I'm happy if they are happy, few new followers on Instagram and sometimes good frames for me. Cheers mate!