Have tried several of the "stringless" varieties in recent years (Wisley Magic, Lady Di, White Lady) which have all been pretty good performers but I sometimes think some of the "real" runner bean taste has been lost as well as the stringiness.
Have grown Celebration this year, (Munty frame - works well!) pretty flowers, good flower-setting, taste possibly better than those mentioned above, BUT as I write this there is not a single new flower on them to keep the crop coming, although I can't complain about the quantity I've had so far.
This may be the result of their early cropping - maybe this variety should be sown in stages to extend the season.
Anyone else's runners apparently decided they've done enough this early?