I need to get BT retrofitted but could do with getting a vat receipt so that I can claim some of the cash back through my company. I tried my local dealer but they didn't know what parts I needed, they also told me that if any wires are cut then it will void the warranty on the electrics and a new loom would cost £2k? Would any wires need cutting for the BT install? Is there somewhere I can source the parts where I can get a vat receipt, i.e. not eBay? Thanks.