That depends what you mean by electrification. All that is currently under way is Bedford to Corby, with probably Kettering to Market Harborough to follow shortly. This doesn't displace many 222s at all, since St Pancras to Corby is only hourly at the moment. To displace 222s and HSTs in quantity you require either new bi-mode trains (which seems to be what will actually happen) or rapid reinstatement of the plan to electrify Market Harborough-Leicester-Derby-Sheffield and East Midlands Parkway-Nottingham. This part of the programme was cancelled by Grayling. At this precise moment, with the new franchise period due to start in a couple of months, there are no orders for new trains, and no plans to electrify beyond Market Harborough.