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Consolidated Statement of Changes in Equity - USD ($)
$ in Thousands
Total
Share Capital [Member]
Share Premium [Member]
Other Components of Equity [Member]
Equity Component of Convertible Notes [Member]
Other Components of Equity [Member]
Fair Value Reserves [Member]
Other Components of Equity [Member]
Share Based Payment Reserve [Member]
Other Components of Equity [Member]
Foreign Currency Translation Reserve [Member]
Accumulated Deficit [Member]
Total [Member]
Non-Controlling Interests [Member]
Adjustment on initial application of IFRS 9 (net of tax)         $ (2,090)     $ (2,090)    
Adjusted balance as at April 1, 2018 $ 1,558,932 $ 52 $ 1,960,691   1,142 $ 78,804 $ 31,705 (513,760) $ 1,558,634 $ 298
Beginning balance at Mar. 31, 2018 1,558,932 52 1,960,691   3,232 78,804 31,705 (515,850) 1,558,634 298
Total comprehensive income (loss) for the year                    
Profit (loss) for the year (167,883)             (167,759) (167,759) (124)
Other comprehensive income (loss)                    
Foreign currency translation differences (72,919)           (72,907)   (72,907) (12)
Equity instruments at FVOCI - net change in fair value (508)       (508)       (508)  
Remeasurement of defined benefit liability (585)             (585) (585)  
Other comprehensive income (loss) for the year, net of tax (74,012)       (508)   (72,907) (585) (74,000) (12)
Total comprehensive loss for the year (241,895)       (508)   (72,907) (168,344) (241,759) (136)
Contributions by owners                    
Share-based payment 40,033         40,002     40,002 31
Issue of ordinary shares on exercise of share based awards 298   16,627     (16,329)     298  
Transfer to accumulated deficit on expiry of share based awards           (50)   50    
Total contributions by owners 40,331   16,627     23,623   50 40,300 31
Ending balance at Mar. 31, 2019 1,357,368 52 1,977,318   634 102,427 (41,202) (682,054) 1,357,175 193
Total comprehensive income (loss) for the year                    
Profit (loss) for the year (447,517)             (447,781) (447,781) 264
Other comprehensive income (loss)                    
Foreign currency translation differences (73,252)           (72,964)   (72,964) (288)
Equity instruments at FVOCI - net change in fair value (1,979)       (1,979)       (1,979)  
Remeasurement of defined benefit liability (346)             (324) (324) (22)
Other comprehensive income (loss) for the year, net of tax (75,577)       (1,979)   (72,964) (324) (75,267) (310)
Total comprehensive loss for the year (523,094)       (1,979)   (72,964) (448,105) (523,048) (46)
Contributions by owners                    
Share-based payment 41,648         41,648     41,648  
Issue of ordinary shares on exercise of share based awards     8,237     (8,237)        
Transfer to accumulated deficit on expiry of share based awards           (100)   290 190 (190)
Total contributions by owners 41,648   8,237     33,311   290 41,838 (190)
Changes in ownership interests in subsidiaries that do not result in a loss of control                    
Financial liability for acquisition of non-controlling interest (14,550)             (14,550) (14,550)  
Acquisition of non-controlling interest (3,178)             (3,178) (3,178)  
Acquisition of subsidiary with non-controlling interest 4,098                 4,098
Total changes in ownership interest in subsidiaries (13,630)             (17,728) (17,728) 4,098
Total transactions with owners 28,018   8,237     33,311   (17,438) 24,110 3,908
Ending balance at Mar. 31, 2020 862,292 52 1,985,555   (1,345) 135,738 (114,166) (1,147,597) 858,237 4,055
Total comprehensive income (loss) for the year                    
Profit (loss) for the year (56,042)             (55,639) (55,639) (403)
Other comprehensive income (loss)                    
Foreign currency translation differences 13,497           13,500   13,500 (3)
Equity instruments at FVOCI - net change in fair value 1,825       1,825       1,825  
Remeasurement of defined benefit liability (199)             (217) (217) 18
Other comprehensive income (loss) for the year, net of tax 15,123       1,825   13,500 (217) 15,108 15
Total comprehensive loss for the year (40,919)       1,825   13,500 (55,856) (40,531) (388)
Contributions by owners                    
Share-based payment 38,399         38,399     38,399  
Issue of ordinary shares on exercise of share based awards 293 1 35,642     (35,350)     293  
Transfer to accumulated deficit on expiry of share based awards           (119)   119    
Issue of convertible notes (net of tax and issue expenses) 31,122     $ 31,122         31,122  
Total contributions by owners 69,814 1 35,642 31,122   2,930   119 69,814  
Ending balance at Mar. 31, 2021 $ 891,187 $ 53 $ 2,021,197 $ 31,122 $ 480 $ 138,668 $ (100,666) $ (1,203,334) $ 887,520 $ 3,667