You call in to usual number and they will schedule re-cabling for you. Cost will be £25.
Might be difficult to co-ordinate if builders want to remove the cabling/box. You will be without service for the duration and if the old equipement isn't isolated/terminated correctly it could (will?) disrupt to others connected near you.
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.