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Other Reserves - Schedule of Other Reserves (Details) - GBP (£) £ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Share option reserve |  |  |
Total other reserves | £ 58,071 | £ 4,064 |
Other Reserves |  |  |
Disclosure Of Other Reserves [Line Items] |  |  |
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

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- Definition A component of equity resulting from discretionary participation features. Discretionary participation features are contractual rights to receive, as a supplement to guaranteed benefits, additional benefits: (a) that are likely to be a significant portion of the total contractual benefits; (b) whose amount or timing is contractually at the discretion of the issuer; and (c) that are contractually based on: (i) the performance of a specified pool of contracts or a specified type of contract; (ii) realised and/or unrealised investment returns on a specified pool of assets held by the issuer; or (iii) the profit or loss of the company, fund or other entity that issues the contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 4 -IssueDate 2017-01-01 -Paragraph IG22 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2017-03-01&anchor=para_IG22_f&doctype=Implementation%20Guidance -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 4 -IssueDate 2017-01-01 -Paragraph 34 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2017-03-01&anchor=para_34_b&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition A component of equity representing exchange differences on translation of financial statements of foreign operations recognised in other comprehensive income and accumulated in equity. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2017-01-01 -Paragraph 52 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_52_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Lapse of share options reserve. + References No definition available. + Details
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- Details
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