Karaoke

This was my first experience of Dennis Potter. Subsequently I find he used similar themes in other works, notably the Singing Detective. Though that work is terrific, I find Karaoke and its sequel Cold Lazarus to be the total package. I am yet to see anything on the small screen which comes close to them. The incomparable Albert Finney leading a strong supporting cast, tight direction and a fascinating story. The characters are so believable, and ironically (as Potter was dying when he wrote this) they are mostly likable despite their many flaws. It is hard to find anyone likable in the Singing Detective My only question is why has the Beeb Beeb Ceeb not released this on DVD?