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Accrued expenses and other current liabilities
12 Months Ended
Dec. 31, 2024
Accrued expenses and other current liabilities  
Accrued expenses and other current liabilities

5. Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

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December 31, 

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December 31,

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2024

    

2023

Accrued employee compensation and benefits

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$

16,272

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$

13,394

Accrued external research and development expenses

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14,978

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11,839

Accrued professional fees

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4,196

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1,143

Current portion of operating lease liabilities

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5,328

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4,876

Current portion of finance lease liabilities

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​

175

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—

Other

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297

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257

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$

41,246

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$

31,509

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In August 2024, the Company consolidated all discovery research activities to the Company’s headquarters in Cambridge, U.K. As a result, during the year ended December 31, 2024, the Company recognized charges of $2.0 million in severance and other one-time termination benefits which are included in research and development expenses in the Company’s consolidated statements of operations and comprehensive loss, of which $1.6 million were paid during the year ended December 31, 2024, and the remaining $0.4 million in unpaid benefits are included in accrued expenses and other current liabilities in the Company’s consolidated balance sheet as of December 31, 2024.