Complex sentence: Following Heath's death in 2005, his estate was bequeathed to the Sir Edward Heath Charitable Foundation, established under his will, with the express intention that the house and its contents should be opened to the public.
Split into simpler sentences: Following Heath's death in 2005, his estate was bequeathed to the Sir Edward Heath Charitable Foundation. In his will, Heath expressed the intention that the house and its contents should be opened to the public.