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Interim consolidated statement of cash flows (Parenthetical) - GBP (£)
6 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Statement of cash flows    
Additions £ 16,332,000 £ 128,765,000
Registrations    
Statement of cash flows    
Additions £ 14,461,000 £ 126,912,000