Non-indigenous species spatial spread in UK waters from 1890 to 2020

Data are spatial occurrence records of thirteen Non-indigenous species (NIS) (*Bonnemaisonia hamifera, Caprella mutica, Crepidula fornicate, Diadumene lineata, Ensis leei, Ficopomatus enigmaticus, Grateloupia turuturu, Magallana gigas, Sargassum muticum, Solidobalanus fallax, Styela clava, Undaria pinnatifida, Urosalpinx cinerea) *subject to analysis under the UK Marine Strategy Indicator Assessment 2024 for the UK indicator 'The number of new populations of established invasive NIS'. Occurrence records from 2003 to 2020 collected in UK waters were combined with baseline data including records as far back as 1890.