Bike on train

Bump...

Wasn't sure where to put this question so here goes:

Has anyone had any experience of traveling with TWO bikes on the train? I usually get the Virgin train from Bham to Ldn no problem with one bike but in a couple of weeks I want to play at polo champs and do a long ride in one weekend. Will they let me book two bikes on or will I need an extra ticket/someone to come with me?

I know all the scotrail trains have a bike space, you don't need to book. Great stuff.

I also had mine on "cross country" without booking. Weird bike section though.