Davy wrote:

[snip]

Because in Britain kidney beans are only available as dried beans and
therefore have to be boiled to make them edible, there are few
recorded cases of red kidney bean poisoning - mostly due to people
adding the beans to slow casserole cookers which don't boil the
beans. I could find no reported cases of poisoning from runner beans.

Only available as dried beans? Whoever did the research you found seems to
have forgotten tins!

--
Linz
Wet Yorks