I think that the Halifax to Hull and York to Bridlington services are pretty likely candidates to receive new bi-mode trains to make use of new TRU electrification.
The Scarborough to Sheffield and Hull to Doncaster services are likely to remain operated by 170s and 158s respectively for the next few years until Northern receive their second tranche of new trains.
The signallers at York ROC would be glad to see the back of the lethargic Class 155s from the East Coast Mainline.