Elsa??

I have the same question. I have just watched the newest DVD version (Network's remastered version, which came out in August 2016), which is 79 minutes in length (the speeded-up PAL version, corresponding to 82 minutes on the old VHS tape), and Elsa has only two or three spoken lines, and probably less than a minute of screen time spread over two or at most three scenes near the end of the film.

Lanchester's character seems to have been central to the subplot about the ghost-busting scientific investigators at the final party at the transplanted Scottish castle. I suspect that this subplot has been almost completely excised from current prints. I can't think of any other reason for the fragmentary nature of Elsa Lanchester's scenes, given her prominent place in the credits.

I notice that the IMDb lists the running time as 95 minutes, which, if correct, means that 13 minutes are missing from the longest current version. Perhaps those minutes were cut by producer Vincent Korda immediately after the movie was first previewed, so that the general release was never longer than 82 minutes; or perhaps the movie was released at 95 minutes but over time the 95-minute version was lost and only a shortened version now survives. I simply do not know. But if anyone out there ever finds a longer version on VHS or DVD, even if only a poor-video, poor-audio version sold by some private vendor on a DVD-R, I would like a note posted here. Even if the print is poor, a longer version would at least enable film fans to get the entire story that the director and screenwriters originally wanted to tell. And doubtless it would contain some more scenes with Elsa.