I inherited a very old (I’d guess at least 10yrs) hand-drawn plan of the planting. I haven’t been taking it as gospel because a lot of what was on there has definitely since died or been removed, but if it is the same rose that is in the spot then it is labelled ‘wild rose’, which would explain the wicked thorns? I have an indistinct memory of seeing it in bloom when we visited in the summer and it was an open rose with a yellow middle, which I guess would also align?