Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)


12 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consist of the following components:
  31 March
(Millions of US dollars) 2021 2020
Finished goods $ 149.9  $ 224.4 
Work-in-process 17.9  25.2 
Raw materials and supplies 60.4  69.9 
Provision for obsolete finished goods and raw materials (9.9) (14.4)
Total inventories $ 218.3  $ 305.1 

The Company identified an immaterial classification error in its 31 March 2020 Inventories footnote which included an understatement in Work-in-process and an overstatement in the Raw materials and supplies balance of US$17.1 million. As such, the prior year amounts above have been reclassified to conform with the current year presentation.