Found where I had read it, see following blog and 6th December posting. Just relaised when "red button" was stated, it could mean the one that is already available before the introduction of the Sky red button for their sports channels say, but that is already reported as coming anyway.
http://virgintivo.blogspot.com/
Cindy Rose, Virgin Media's digital entertainment executive director, told PaidContent:UK more about the software development for Virgin's version of TiVo:
It’s based on the main TiVo software code tree. We’ve branched slightly to adapt it to the UK market. The U.S. doesn’t have catch-up, Red Button or a watershed - we had to make certain minimal changes to make it relevant for the UK. We also painted it red and corrected the spelling!
Other than that, we’ve stayed true to the core TiVo product. That will make it easier for us in future to stay consistent with TiVo’s main-line development roadmap.