v3.25.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2025
Jul. 31, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Amendment Flag false  
Document Period End Date Jun. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Registrant Name Silence Therapeutics plc  
Entity Central Index Key 0001479615  
Entity File Number 001-39487  
Entity Tax Identification Number 00-0000000  
Entity Incorporation, State or Country Code X0  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Shell Company false  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Address, Address Line One 72 Hammersmith Road  
Entity Address, City or Town London  
Entity Address, Country GB  
Entity Address, Postal Zip Code W14 8TH  
City Area Code +44 20  
Local Phone Number 3457 6900  
Entity Common Stock, Shares Outstanding   141,701,848
American Depositary Shares    
Document Information [Line Items]    
Title of 12(b) Security American Depository Shares, each representing one ordinary share, nominal value £0.05 per share  
Trading Symbol SLN  
Security Exchange Name NASDAQ  
Ordinary Shares    
Document Information [Line Items]    
Title of 12(b) Security [1] Ordinary Share, nominal value £0.05 per share  
No Trading Symbol Flag true  
Security Exchange Name [1] NASDAQ  
[1] Not for trading, but only in connection with the listing of the American Depositary Shares on The Nasdaq Stock Market LLC