Hm, righto. You're in luck, actually, there's been a recent Archeological find in Britain of an amazing burial site from the early medieval period (600-1000). A couple of links that might be of use to you:
http://www.sciencedaily.com/releases/2006/01/060131091935.htm
http://www.culture24.org.uk/history+%2526+heritage/archaeology/art26611
http://www.jpost.com/Home/Article.aspx?id=169405
The Staffordshire Hoard is the most recent find: http://www.staffordshirehoard.org.uk/ and is *amazing*.

The Maciejowski Bible would have a few ideas about burials:
http://www.medievaltymes.com/courtyard/maciejowski_bible.htm

I'd also suggest looking for medieval family Bibles - like the Maciejowski Bible, the illuminations give a lot of information about how people lived, worked and died. If you need anything else, let me know. :D