Key financial data

$ million 2018 2017 Change Constant currency change
Revenue 2,070 1,936 +7% +8%
Core revenue 2,076 1,936 +7% +8%
Gross profit 1,050 967 +9% +10%
Core gross profit 1,072 973 +10% +12%
Operating profit/(loss) 371 (747) N/A N/A
Core operating profit 460 386 +19% +24%
EBITDA 492 488 +1% +5%
Core EBITDA 549 468 +17% +21%
Profit/(loss) attributable to shareholders 282 (843) N/A N/A
Core profit attributable to shareholders 332 252 +32% +39%
Basic earnings/(loss) per share (cents) 117.0 (351.3) N/A N/A
Core basic earnings per share (cents) 137.8 105.0 +31% +38%
Dividend per share (cents) 38.0 34.0 +12% -
Net cash flow from operating activities 430 443 (3)% -