Sadly, I wasn’t wholly convinced he is an interesting enough character to warrant a 131-minute documentary.

Despite the ambiguous title, the main focus of the film isn’t Clapton’s battle with the booze but his obsession with the “12 bar” format of the blues.

Perhaps taking her cue from the hit Amy Winehouse documentary, director Lili Fini Zanuck overlays rare archive footage with audio interviews to take us through his career from schoolboy musician to rock god.

There are some hilarious haircuts and a string of thrilling live performances.

But I started to lose interest when the film got bogged down in his tawdry affair with Pattie Boyd, then the wife of his supposedly best friend George Harrison.

Never meet your heroes, goes the old saying.

Perhaps it’s best not to watch exhaustive documentaries about them either.