This appears in my garden in new places every year. I quite like it, but have no idea what it is, any ideas? It’s about 30” tall, maybe a bit more .
Carmarthenshire (mild, wet, windy). Loam over shale, very slightly sloping, so free draining. Mildly acidic or neutral.
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https://www.gardenersworld.com/plants/linaria-purpurea/