1) ride for yourself. I felt pressured with an obviously experienced and competent rider filtering behind me. At a round about, concerned I was holding him up I went for it into a space. Space was fine but I was going to quickly for my skill and off’d onto the roundabout. He came to help. Ride your own ride, other can wait the likely seconds.
2)if you have an accident, if you are able walk the scene with your camera in selfie mode and describe the events straight away. Include images of the other vehicle, what happened and the other driver if you oh can.
8i was ridden into at a t junction, I was stationary. I didn’t even take photos. Wish I had.