It seems you're referring to and the label BD9 (commonly used in fan rips for a Blu-ray Disc 9 encoding — often 720p or 1080p, moderate bitrate).

Season 7 of the UK series originally aired in (hosted by Ant & Dec, with winner Christopher Biggins ). If you’re looking for that specific BD9 release, it would be a fan-made encode from the DVD or broadcast source, since official Blu-rays of that series are rare (most early seasons only exist on DVD or SD broadcast).