Marching Figures - London Street Art

Last summer, I captured a couple of images of street art featuring marching robotic figures. I discovered these in two places, and they are by the same artist (simply signed 'b.'), but I am not able to find out anything else about them.* One of the examples (with blue figures) was located just off Brick Lane, and the other (with orange figures) was located near Shoreditch High Street station.