sentences:  Contrary to Drummond's previous 4-6-0 designs, the D15s performed exceptionally well and were put to work on trains to Bournemouth, where many drivers noted their superior operational characteristics when compared to the T14 class 4-6-0s.This was due to a marked reduction in coal, water and oil consumption, and easier maintenance.However, with the succession of Urie, no further D15s were constructed, as he preferred to concentrate on 4-6-0 designs.