Harry Morgan was a Graduate Mechanical Engineer at Crossrail providing mechanical engineering support to the Chief Engineers Group until October 2017. He is currently employed by Transport for London and had a secondment with Crossrail for 4 months and it is during this time that he was able to write this technical paper. Harry completed his Mechanical Engineering degree with the University of Sheffield in 2016 and had experience working for Transport Systems Catapult for the two summers before joining TfL in September 2016.