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Cash and Cash Equivalents (Tables) | 12 Months Ended
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Dec. 31, 2020
Cash And Cash Equivalents [Abstract] |
Schedule of Detailed Information About Cash and Cash Equivalents |
|  | 2020 |  |  | 2019 |
|  | (in thousands) |
|  | £ |  |  | £ |
Cash and cash equivalents |  |  | 87,356 |  |  |  | 51,962 |

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- Definition The disclosure of cash cash equivalents and short-term deposits. + References No definition available. + Details
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