Some of these did not return, but we had a very cold winter in '14-'15. Stem is taller than British Gamble, but may be less hardy. Was lovely here in 2016, but rough weather can take a toll on the large flowers.
Edited 2018: Sentinel recurs fairly well. The flower is exquisitely beautiful. Stems could be stronger, but others in this color (such as British Gamble) can also nod. Lasts well in vase, as does British Gamble.