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Other Reserves (Tables)
 12 Months Ended
Dec. 31, 2017
Other Reserves  
Disclosure Of Other Reserves [Line Items]  
Schedule of Other Reserves

 

 

2017

 

 

2016

 

 

2015

 

 

 

(in thousands)

 

 

 

£

 

 

£

 

 

£

 

Own share reserve

 

 

(339

)

 

 

(339

)

 

 

(339

)

Foreign currency translation reserve

 

 

(11

)

 

 

(3

)

 

 

(1

)

Capital reserve

 

 

42,466

 

 

 

—

 

 

 

—

 

Share option reserve

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

 

 

4,406

 

 

 

3,291

 

 

 

2,506

 

Share-based payments

 

 

11,731

 

 

 

1,132

 

 

 

785

 

Exercise of share options

 

 

(180

)

 

 

(17

)

 

 

—

 

Lapse of share options

 

 

(2

)

 

 

—

 

 

 

—

 

Balance at end of year

 

 

15,955

 

 

 

4,406

 

 

 

3,291

 

Total other reserves

 

 

58,071

 

 

 

4,064

 

 

 

2,951