No, to begin with they would have to use the existing resources. The important thing is to get the management of those services with Greater Anglia.
In the medium term I'd be hoping for some new battery bimodes for the Stansted trains, releasing some class 755s for Norwich-Peterborough.
In the context of this discussion, the important thing is to recognise is that Greater Anglia is delivering positive change in May 2026. East Anglia, and Cambridge in particular, needs more of that, but we are unlikely to get it from Cross Country or East Midlands.