£11.50 per month for the Tivo as a multiroom. Just called support. I can't have 2x V6 boxes AND the Tivo as then I'd have to have all 3 charged to my account so, it's 1x V6 and 1x Tivo box, then, once all recordings have been viewed, I can swap out the Tivo for the 2nd V6.
Also, I note that the router must be next to the V6, it can't be using wi-fi, it needs Ethernet connection. Something I didn't realise.