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Cash, Cash Equivalents And Short-Term Deposits (Tables)
12 Months Ended
Dec. 31, 2017
Cash And Cash Equivalents [Abstract]  
Schedule of Cash, Cash Equivalents and Short-Term Deposits

 

 

2017

 

 

2016

 

 

 

(in thousands)

 

 

 

£

 

 

£

 

Cash and cash equivalents

 

 

86,703

 

 

 

19,990