Hello ShaolinMonkey and welcome to the Railway Forum.
I found this info on
http://www.railblue.com/Fleet/class_86_fleet.htm
E3144
86048, 86260 Driver Wallace Oakes GC Locomotive still extant as at 11.07
There is nothing about "Cassiopeia 86702".
There is a photo of the name plate at
http://www.railblue.com/pages/Class%..._nameplate.htm