Thanks Matthew, I've probably not explained myself correctly..
My virgin mobile account has 2 numbers in it, mine (Number a) and my ex partners (Number b)
I'm moving my number (number a) away from Virgin, so the PAC code etc is all sorted, and I understand that process.
My ex partners (number b) is staying with Virgin, however that number is currently in my virgin account. I'll be closing my virgin account as I'll not need it any longer. Whats the process for moving number b to a new / different / existing virgin mobile account?
Does that make sense?