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Financial Instruments Risk Management (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Financial Instruments [Abstract] |
Schedule of Financial Assets Subject to Fixed or Variable Interest Rates | Financial assets subject to fixed or variable interest rates are as follows:
|  | 2020 |  |  | 2019 |
|  | (in thousands) |
|  | Carrying amount |  |  | Carrying amount |
|  | £ |  |  | £ |
Financial assets at short-term fixed rates |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 48,432 |  |  |  | 41,827 |
Financial assets at variable rates |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 5,470 |  |  |  | 7,108 |
Non-interest bearing cash balances |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 33,454 |  |  |  | 3,027 |
Summary of Financial Assets and Liabilities in Foreign Currencies, Primarily Held in U.S Dollars | Financial assets and liabilities in foreign currencies, primarily held in U.S. dollars, are as follows:
|  | 2020 |  |  | 2019 |
|  | (in thousands) |
|  | Carrying amount |  |  | Carrying amount |
|  | £ |  |  | £ |
Financial assets |  |  |  |  |  |  |  |
Prepayments, accrued income and other receivables |  |  | 2,079 |  |  |  | 2,174 |
Current income tax receivable |  |  | 4 |  |  |  | 4 |
Cash and cash equivalents |  |  | 70,419 |  |  |  | 28,980 |
Financial liabilities |  |  |  |  |  |  |  |
Trade payables |  |  | 409 |  |  |  | 549 |
Payroll taxes and social security |  |  | 1 |  |  |  | 18 |
Lease liabilities |  |  | 105 |  |  |  | 52 |
Accrued expenditure |  |  | 926 |  |  |  | 989 |

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- Definition The disclosure of detailed information about financial instruments. [Refer: Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 31 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_31&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 35K -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_35K&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The disclosure of financial instruments by type of interest rate. [Refer: Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 39 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_39&doctype=Standard -URIDate 2020-01-01 + Details
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