http://costain.com/20221231 (7484F535) cost.zip Contains (i)XBRL report and taxonomy extension for Costain financial statements (2022-12-31) 2022-12-31_1680086176 Costain GB 2022-12-31 Costain XBRL Taxonomy for 2022-12-31 Costain XBRL report for 2022-12-31 en