I came across this website that lists various scholarships for UK institutions: http://www.educationuk.org/pls/hot_bc/bc_edufin.page_pls_user_scholarship .  Unfortunately, they don’t narrow it down beyond ‘humanities’, but you can see which departments are offering the financial aid, so it’s not that difficult to filter through them.

Also, there appears to be other generic info about UK education stuff for internationals on the site.