Good Meat Reference - North American Beef Processors
London broil is not a cut though the way most grocery stores use it you would think it is. It is actually a preparation method and the original way was to pan fry a flank steak quickly to medium rare and then cut across the grain into thin slices. The more common preparation now days is to marinate and grill and then slice thinly across the grain.
Thanks Joe, charlie and Missy. I think I was hoping I had some super
duper top of the line quality of beef. I'm not a real beef fan but John is so I try and toss it on the menu once in a while. I am always disappointed when I do London Broil. It just always seems tough and we always grill to med-rare and cut across the grain. I had a friend that would make it and it was always so tender but I was never able to find out why. I wondered if I wasn't buying the correct "cut". I've saved that link Missy. Just an excellent resource. Thanks!