That would be unlikely, I don't think that the current WAG Express rolling stock is through wired for remote operation of the 67 from the DVT. The 67s will simply take over the present arrangement from the 57s for the time being.
The last northbound 57 WAG express on Friday had an extra Mk.2 TSO in it for some reason, so ran as 57316 - Mk.3 RBF - Mk.2 TSO - Mk.2 TSO - Mk.2 TSO - Mk.2 BSO.
Does anyone know why this was?
Here is my video of it arriving into Flint. http://youtu.be/-4llKBGS778