
This package provides the british-huge dictionary, based on the britishxlg+ dictionary supplied with the source for ispell, with additional words added from the more comprehensive wbritish-huge word list package.
This is an even larger dictionary than the one installed by ibritish-large. Nothing prevents you installing both (and others) at the same time.
There are also -small, -large, -insane, and standard versions of this dictionary, and there are iamerican* packages as well.
The package also suggests wbritish-huge because ispell's (L)ookup command needs a word list.