My first post on the site but thought I needed to share my very recent experience!
I am on mates rates (£38) for 2 x V+, 30MB BB, Phone and XL TV.
I thought I would call this evening to try and get TiVo as TBH had a few probs with the V+ HD box failing - quite recently but the engineer couldnt swap for TiVo without apparently losing my mates rate - would need to phone Customer Services.
Anyhow, a quick call this evening and they are replacing both boxes with TiVo and waivering the 50quid is install for £3 p.m or so he said, then he came back and said actually on mates rates, the discount for 2 x TiVo boxes now means I pay £29!
I triple checked this wanst an introductory offer, I was still on mates rates etc. Well chuffed!