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Cash, Cash Equivalents And Short-Term Deposits | 12 Months Ended
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Dec. 31, 2017
Cash And Cash Equivalents [Abstract] |
Cash, cash equivalents and short-term deposits | 15. Cash, cash equivalents and short-term deposits
|  | 2017 |  |  | 2016 |
|  | (in thousands) |
|  | £ |  |  | £ |
Cash and cash equivalents |  |  | 86,703 |  |  |  | 19,990 |
Cash and cash equivalents comprise cash at banks with maturity of three months or less, which is subject to insignificant risk of changes in value. Cash at banks earn interest at fixed or variable rates based on the terms agreed for each account. Liquidity risk is minimal and is managed using deposits with immediate and varied fixed term dates. Cash, cash equivalents and short term deposits are measured at fair value and classified as Level 1 under the fair value level hierarchy.

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- Definition The disclosure of cash and cash equivalents. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
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