Tommy Mac
The depth of a hazard has nothing to do with "penal" architecture. Its the placemnet of the hazard which is key.
First we have to agree on what "penal" means. I contend that forced carries and dictated routes of play constitute penal architecture. This would include proper cross bunkers (no fairway alley to play around), playing between "pinching" bunkers and over hazards either man-made or not. That isn't to say one type of forced carry can't be more strategic (read diagonal) than another, but a forced carry is a key component of penal architecture. Operating on the above definition, of the post 1900 British archies working during the classic era (say 1900 to WWII) I believe Fowler was the biggest exponent (in practice). Braid may well have liked the idea of more penal architecture, but in my experience, he rarely practiced it. Instead, I think Braid was a realist in fitting the style of design to the intended users and available budget. I have searched for that seemingly elusive penal Braid design, but to no avail. Perhaps his work at Carnoustie, such as what little he did there, is the smoking gun. I think Taylor was a bit more insistent on penal designs, but even he was clearly won over to more strategic designs, certainly by the time he paired with Hawtree.
All that said, and I thought this was made clear, in essence, my stance is that true penal architecture did not for any intents and purposes truly exist in the UK after 1900ish. There were penal elements used, but in an overall framework of strategic design.
Ciao