You're right zec, the 9 has nothing to do with Connex, all it is, is just a logo. Oh and be warned, for some of us, Connex is a very dirty word, especially up here.
They were our Train Operating Company for the former Network SouthEast area, covering, London, Brighton, Portsmouth and Southampton in the UK, but they were horribly bad at operating their franchise, so they got ousted out. They are now replaced by GoVia Southern.