Well, 26% Crystal in an ESB looks very reasonable, and would probably be okay if the C40 was instead half-and-half Carastan and C10 or C20 (don't get me wrong -- it would be sweet, but it would make sense) when one considers there's +- 40% of Honey Malt (with +- 15% dark Crystal on top of it!) in that American Brown Ale.
For a strong bitter 26% crystal is way too much. It's not going to finish anywhere near dry enough. Some body and caramel, yes, but more than 10% is overkill. (I could see it in a mild, though).
The only malt I use large amounts of is Brown malt. 15-30% just makes a porter.