| Document and Entity Information | Feb. 27, 2025 |
| Document And Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 27, 2025 |
| Entity Registrant Name | Silence Therapeutics plc |
| Entity Incorporation State Country Code | X0 |
| Entity File Number | 001-39487 |
| Entity Tax Identification Number | 00-0000000 |
| Entity Address Address Line 1 | 72 Hammersmith Road |
| Entity Address City Or Town | London |
| Entity Address Country | GB |
| Entity Address Postal Zip Code | W14 8TH |
| Country Region | 44 |
| City Area Code | 20 |
| Local Phone Number | 3457 6900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001479615 |
| American Depositary Shares, each representing 3 ordinary shares, nominal value £0.05 per share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | American Depositary Shares, each representing 3 ordinary shares, nominal value £0.05 per share |
| Trading Symbol | SLN |
| Security Exchange Name | NASDAQ |
| Ordinary share, nominal value £0.05 per share* [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Ordinary share, nominal value £0.05 per share |
| Security Exchange Name | NASDAQ |
| No Trading Symbol Flag | true |
