Modern Railways states two class 170s will transfer from ScotRail this month, with balance following in June; they are to be repainted first, then to Etches Park for driver training and preparation for service entry. It also says that they will be introduced initially on the Robin Hood Line.
Regarding the transfer of 171s, the magazine claims they will only be moved once suitable replacements have been identified. It states that although the fitting of batteries to Electrostars has been considered, "it is understood the current technology is limited to three-car operation, which is not useful from an operational prospective"
It then goes on to say that "an extension of third rail is now looking more likely, with a short extension on Merseyrail potentially setting a precedent".
I guess this means that the 171s won't be transferring to EMR next summer.