Myself I would have not given East Coast to any company who wants to use Virgin branding for its trains, it will lead to total confusion with tickets for the general public. You will find people turning up with a ticket for Glasgow at Kings Cross getting on a Virgin train only to find there ticket is from Euston to Glasgow and can,t understand why they can,t use it , since East Coast is a Virgin train on the outside branding wise but franchise company wise a totally differant company.
Why must everybody think that a Virgin Train is going to be something differant, when all said and done its a train to take you from A to B which you hope will get you there and maybe you will get a seat and be on time, thats the same as every other train run by differant companies.
Also the comment about swapping trains between routes, forget it its not going to happen as the trains go with the franchise and belong to the leasing company and if you don,t keep up the payments they will be repossed.