Tall (30cm+) plant with linear leaves clasping stem. Flower/bud resembles ragwort. On shingle.
No interactions present.
Many thanks for id. Not seen before and wondered if a hybrid. I got to ragworts but the narrow leaves fooled me. Cheers. Sadly lots of alien species spreading on Walmer/Kingsdown shingle - as you can see it is growing with hoards of red valerian.
Lat/Lng: 51.1973, 1.4039
OS grid ref: TR379497