Basis of Presentation and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Basis Of Presentation And Summary Of Significant Accounting Policies	2. Basis of presentation and summary of significant accounting policies Basis of presentation The condensed consolidated financial statements of the Company and its subsidiaries and other financial information included in this Quarterly Report are unaudited, have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and are presented in U.S. dollars. All significant intercompany accounts and transactions between the Company and its subsidiaries have been eliminated on consolidation. The unaudited condensed consolidated financial statements presented in this Quarterly Report should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K filed with the SEC on March 27, 2024 (the “2023 Annual Report”). The condensed consolidated balance sheet as of December 31, 2023 was derived from audited consolidated financial statements included in the Company’s Annual Report but does not include all disclosures required by U.S. GAAP. The Company’s significant accounting policies are described in Note 2 to those consolidated financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted from these interim financial statements. However, these interim financial statements include all adjustments which are, in the opinion of management, necessary to fairly state the Company's financial position as of June 30, 2024, the results of operations for the three and six months ended June 30, 2024 and 2023 and cash flows for the six months ended June 30, 2024 and 2023. The interim results are not necessarily indicative of results to be expected for the full year. Going concern The Company is subject to risks common to companies in the biotechnology industry, including but not limited to, risks of delays in initiating or continuing research programs and clinical trials, risks of failure of preclinical studies and clinical trials, the need to obtain marketing approval for any drug product candidate that it may identify and develop, the need to successfully commercialize and gain market acceptance of its product candidates, if approved, dependence on key personnel and collaboration partners, protection of proprietary technology, compliance with government regulations, development by competitors of technological innovations, and the ability to secure additional capital to fund operations. Product candidates currently under development will require significant additional research and development efforts, including pre-clinical and clinical testing and regulatory approval prior to commercialization. Even if the Company’s research and development efforts are successful, it is uncertain when, if ever, the Company will realize significant revenue from product sales. The Company has historically been loss making, anticipates that it will continue to incur losses for the foreseeable future, and had an accumulated deficit of $440.8 million as of June 30, 2024. The Company has funded these losses through a combination of public equity financings, private equity and debt financings and various license and collaboration agreements, and it expects it will continue to do so until such time as it can generate significant revenue from product sales, or other commercial revenues, if ever, or through licensing and/or collaboration agreements for its rare disease or oncology product candidates. Although the Company recently raised net proceeds of $47.0 million before issuance costs through an underwritten registered direct offering of its ADSs, there is no assurance that it will continue to be successful in obtaining sufficient funding on terms acceptable to the Company to fund continuing operations, if at all. As of June 30, 2024, the Company had cash and cash equivalents of $87.4 million. The Company expects that its cash and cash equivalents as of June 30, 2024 will be sufficient to fund its operations and capital expenditure requirements for at least twelve months from the date of filing of this Quarterly Report on Form 10-Q. Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting periods. Significant estimates and assumptions reflected in the Company's unaudited condensed financial statements include, but are not limited to, revenue recognition on contracts with customers and convertible loan notes. Estimates are periodically reviewed in light of changes in circumstances, facts and experience. Changes in estimates are recorded in the period in which they become known. Actual results could differ from those estimates.