v3.26.1
Cover
Aug. 06, 2026
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Aug. 06, 2026
Registrant Name Immunocore Holdings plc
Entity Incorporation, State or Country Code X0
Entity File Number 001-39992
Entity Address, Address Line One 92 Park Drive,
Entity Address, Address Line Two Milton Park Abingdon
Entity Address, City or Town Oxfordshire,
Entity Address, Country GB
Entity Address, Postal Zip Code OX14 4RY
Country Region 44
City Area Code 1235
Local Phone Number 438600
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
Central Index Key 0001671927
American Depositary Shares  
Document Information [Line Items]  
Title of 12(b) Security American Depositary Shares, each representing one ordinary share, nominal value £0.002 per share
Trading Symbol IMCR
Security Exchange Name NASDAQ
Common Stock  
Document Information [Line Items]  
Title of 12(b) Security Ordinary share, nominal value £0.002 per share*
No Trading Symbol Flag true
Security Exchange Name NASDAQ