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Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Feb. 23, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-38067    
Entity Registrant Name Verona Pharma plc    
Entity Incorporation, State or Country Code X0    
Entity Tax Identification Number 98-1489389    
Entity Address, Address Line One 3 More London Riverside    
Entity Address, City or Town London    
Entity Address, Postal Zip Code SE1 2RE    
Entity Address, Country GB    
Country Region 44    
City Area Code 203    
Local Phone Number 283 4200    
Title of 12(b) Security Ordinary shares, nominal value £0.05 per share*    
Trading Symbol VRNA    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 1,500.0
Entity Common Stock, Shares Outstanding   646,524,958  
Documents Incorporated by Reference Portions of the registrant’s definitive proxy statement that the registrant intends to file with the Securities and Exchange Commission pursuant to Regulation 14A in connection with the registrant’s 2024 Annual Meeting of Shareholders are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein.    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001657312