Relocating a genuine cable box

Moving from TW area to N*L (North East UK) is obviously no probs for my EVs but I also have a subscribed for VGN box and my own non subscribed VGN box. Will I be able to move both those VGN boxes and use them as I do now in a different provider area. ( I always intend to have one subscribed to.) VGN are hooking me up officially when I move so I don't know if I hand back my shiny subscribed box or am encouraged to lose it in the move. Anyone got any nfo on moving area issues. Any advice appreciated