Williams or Brands Hatch are not to blame, that kind of accident is freak and unavoidable, wheels will break off and there is no 100% guarenteed way to prevent them from doing so. Motor racing is dangerous and I think it would be very disrespectful to Surtees (who was devoted to racing), if there was a witch hunt against racing as a result of this. Those kind of incidents are horrible but can happen with any single seater car on any track.