A passenger train, running from London Victoria to East Grinstead, passed across a junction less than two minutes before an engineering train that was travelling in the opposite direction. The engineering train, formed of an on track machine known as a tamper, was making an un-signalled move that had not been correctly authorised when it left a possession (in which a section of line had been closed to railway traffic to allow engineering work to take place). There were no injuries or other adverse consequence although, if the circumstances had been slightly different, there was the potential for the two trains to have collided.
