An MA / MRes in humanities would be funded through the Arts and Humanities Research Council (AHRC), but competition is very fierce. Some universities also offer bursaries for thier MA courses, but it just depends on the place, and you'd need to look into it. You may end up paying for the MA/MRes yourself (e.g. by taking out a career development loan and / or working part-time).
If you did well on your MA/MRes, you could then go for a PhD. Again, funding would come through the AHRC if you were lucky, or sometimes a university. Many people fund their own PhDs too.
Hope that helps.