Here you go -
http://my.virginmedia.com/my-offers/index (click on the TiVo tab)
Free 'activation fee' for the 500GB TiVo box but you'll probably have to pay £49.95 for installation although you could always try and barter.
Alternatively, dependant on how much you currently pay for your services, you could be better off switching to the Premiere Collection which includes TiVo (details here -
https://my.virginmedia.com/customer-...llections.html) for £62.99 a month.
Whichever way you go, TiVo is definitely a good service so hope you enjoy it if you go for it.