Young Sherlock Holmes star Nicholas Rowe back for cameo in Mr Holmes

For people of a certain vintage Young Sherlock Holmes holds a special place in their heart.

The adventure film, which hits cinemas in 1985, told the story of the early years of the great detective, as he solves a puzzling problem while attending secondary school. It was a fun ride, with great allusions to the stories of Arthur Conan Doyle, an enjoyable score and spry direction by Brian Levinson. And it was also the first time a photo-real CG character was used in a film, in a then mind-bending sequence where a stained-glass window comes alive for some sinister doings.