Just speculating here, but this could become a common occurrence in the future. when Avanti releases its Voyagers, they are most likely to move to XC and maybe the EMR 222's as well (as that would put all Bombardier High Speed DEMU's under one operator.) In return the XC 170's would probably move to join the rest of the fleet with either EMR or Northern, Which means that Voyagers would be used on Cardiff - Nottingham and New Street - Cambridge services. Of course, this all depends on the next XC franchise which is renewed in a couple of years i believe. Of course, it would help if some loco hauled trains were used.....