Newbury Branchlines 1.5 builds upon the existing 1.0 route by extending the DN&SR down to Winchester, a distance that's over twice that of the Newbury to Didcot section. This means 1.5 has over 3x the distance of track to run, 8 new stations and a completely revised timetable with run times now ranging from 20 to 80 minutes.

1.51 added new service timetables for the class 03 shunter

1.5 Extended the existing 1.0 route down to Winchester from Newbury