A few weeks ago I was cycling along the CS2 (cycle superhighway!) which is embedded in a bus lane along the Whitechapel Road. A large lorry in the right hand lane drew level with me and we continues for about 200 yards. As we approached a junction he started to move left, at this point I was ahead of him, in my mirror I saw him start to turn left (from the right hand lane) and at this point he must have noticed me as he hit his horn as if in warning. Who was at fault here? I had no idea he was going to turn left before he started as his indicators weren't visible and from his position I had every expectation he would be carrying straight on. He couldn't see me once he had drawn level and must have just assumed he had overtaken me. It's so easy for these things to happen.