The standard first- and second- line chemotherapy backbone regimens for metastatic colorectal cancer (mCRC) are 5-fluorouracil (5-FU)/capecitabine-based with addition of irinotecan or oxaliplatin. Until recently, evidence for optimal sequencing post second-line was sparse. | Review of metastatic colorectal cancer treatment pathways and early clinical experience of trifluridine tipiracil in the UK named patient programme