Not a film, but there are two tv versions of The Blue Carbunkle - the Sherlock Holmes Christmas tale.

Both the Jeremy Brett and Peter Cushing versions are great.

There’s also A Christmas Horror Story - a horror portmanteau starring William Shatner. Lots of fun if that’s your thing.

He’s a good egg :)

The bathroom almost looks AI.

I'm both impressed and repulsed all at once.