Wouldn't be surprised if its the same as a non fault alteration, as you are not adding your package (£99). However, additional sockets & wiring (as with BT installations) can be added by the customer, as anything forward of the master socket is your property. If you feel competent, you can get the necessary kit from a DIY store. If not many electricians or aerial installers will do the job for you, & may well be cheaper than getting VM in.
Cable customer since 1993. Services: FH TV, Sky Sports & Movies (2xV6), Talk Anytime Phone, VIVID 350, Virgin PAYG Mobile