Liriodendron said: I think it could be Virginia Stock, a pretty annual which seeds itself if it's happy.
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I live in west central Scotland - not where that photo is...
https://www.google.com/search?q=malcolmia+maritima&rlz=1C1CHBF_enGB785GB785&sxsrf=ALeKk03j269q_tD76zMZb0Ysd-gzSRowNA:1623851023350&source=lnms&tbm=isch&sa=X&ved=2ahUKEwiPsai7pJzxAhWTX8AKHedfBd4Q_AUoAXoECAEQAw&biw=1278&bih=561