Yeah, twas always thus, but that aint the same as EDL's being "banned" from working trains in diesel conditions, single loco. I'd just like to see the reference for this instruction
The Sectional Appendix General Instructions South East (Kent, Sussex, & Wessex) states the following
Class 73 electro-diesel locomotive working on diesel power
When a train hauled by an electro-diesel locomotive is required to travel over a section of line where electric traction current is normally available but has been isolated due to incident or engineering works, etc. the following will apply:-
Train running with normal load - train times over the section of line concerned to be increased by 50%.
Trains running at normal speed train loading to be reduced by 60%