It's a series 1 UK TiVo with a TurboNet card, so I'd need an Ethernet bridge or to put a wireless TurboNet card in.

If I had a phone line in the office I'd not have a problem and I would put the TiVo on wireless. Unfortunately as is common with most UK homes, there's only one phone socket provided in the most inconvenient location possible, in my case it's behind the TV. I can't run a cable for a new phone socket as this is a rented house.