Did a search of the freebmd and only came up with one death for a Catherine Beattie that fitted with the year of birth you gave & it is in the same area. I stuck to the correct spelling, but I'll try other spellings to see if anything pops up & get back to you.:biggrin:
December quarter 1906
Catherine Beattie age 18 Manchester vol 8d page 166
I searched from 1888 - 1920 there are not many births transcribed after that date as it is an ongoing project.
You would have to order a certificate to be sure.