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Undoubtedly an introduction - it sometimes occurs as a casual with grass seed or rogue sowing of 'wild flower seed'.
Checked today,still thriving,with 50 or so plants min.
This is good to know.
I hope I shall be able to go and see it myself, but my health has not been good this year and I am just out of hospital after surgery, so it's beyond me at the moment.
Will be glad to assist when you feel up to it
Lat/Lng: 55.9689, -2.4052
OS grid ref: NT748751