I had Alnwick. Emphasis on had. Took it out this year. Did not bloom enough for me and mine was barely fragrant. I Gave it several years but decided it needed to go and put something better in its place.
I find in my hot, hot, hot Zone 9 (and cold in winter--not Minn. cold but cold for here) that most DA roses just don't perform well. They were bred in England where it is much colder and wetter than conditions here. None of the ones that I have grown do all that well as a cut flower. They may last a day or two and that is it as a cut flower.
If you can give a DA rose afternoon shade, they (for the most part) tend to do better. They also tend to be water hogs. I find mine perform much better with an adequate drip system and lots and lots of mulch to help protect from the heat. They all pretty much go dormant during the summer and perk up again in the fall when it is about 30 degrees cooler. Unfortunately, most of the ones that have done well for me during the summer are no longer available. The best ones for me in full sun are Mary Magdalene and Ambridge Rose. I didn't like the scent of Ambridge at all and after a decade or more, finally got rid of it. MM is incredible. Takes a bit to come into her own but she is a great rose for my climate.
Other DA roses that do well (but get about a half day of sun) are Pretty Jessica, Munstead Wood, and Princess Alexandra of Kent. Actually these three get afternoon sun and do really well. My other DA roses are pretty much dormant during the summer. If they bloom at all, it is one or two blooms and then they are not as full as in the spring. The plants are just trying to survive in the 100+ degree heat.
Other DA roses I have had or have now but are dormant during the summer would be;
Lady Emma Hamilton (died within the first month of having her during the summer)
Mary Webb--no longer available
Sharifa Asma--MM is a better rose for my climate and looks similar to Sharifa
Jubilee Celebration--too young to fully judge yet
Lady of Shalott
Sister Elizabeth--gone, gone, gone
Heritage--my ineptness as a new gardener basically killed this one (unfortunately)