Have you had a drive for Health & NHS-related clients, lol?? BIM54000 I quoted in reply to your previous post would be a good start for dentists, too. http://www.book-keepers.org.uk/t49585608/new-client-contractor/
Also have a peek at VAT notice 701/57 http://customs.hmrc.gov.uk/channelsPortalWebApp/channelsPortalWebApp.portal?_nfpb=true&_pageLabel=pageVAT_ShowContent&propertyType=document&id=HMCE_CL_000121