Of course. I was using that traffic flow as an example. A similar way to the drawback loco used to haul the ECS off the Up Cornish Riviera back from Paddington to Reading, and moreso the ECS for the Down Riviera which would sit on the blocks at Paddington under the overall roof.
From what I read at the time the 93s would replace the Europhoenix / ROG 37s for all their various activities, and with various benefits. An example would be a Kirkdale - Sims class 507 drag with vitually no AC use, compared to say an Ilford - Sims movement where probably the West London incline would be practically the only diesel part odf the journey - dependent on the authorisation of 93s to use OLE.