This is a fab resource for checking the distribution of wildflowers in the UK.
This website provides access to the results of Plant Atlas 2020, the most comprehensive survey of plants (flowering plants, ferns and charophytes) ever undertaken in Britain and Ireland. It is based on over 30 million records, collected mainly by volunteer recorders of the Botanical Society of Britain and Ireland (BSBI) between 2000 and 2019, as well as previous nationwide surveys undertaken in the 1950s and 1990s. For Plant Atlas 2020 these records have been summarized as 10 × 10 km grid square (hectad) distribution maps for 3,495 species, alongside expert accounts of their national status, habitats, biogeography and trends.