Capillary-Venous Paired Data Collection

CANCER COHORT: Subjects fulfilling all of the following inclusion criteria are eligible for the study: * Age ≥18 years old at the time of study entry * Currently receiving standard-of-care systemic anti-cancer therapy (chemotherapy, immunotherapy, endocrine and targeted therapy) for solid organ malignancy * Scheduled to be undergoing routine venous laboratory blood tests as part of the standard of care * Able to provide capillary whole blood donation from pricking three different fingers on one hand * Can provide written informed consent * In the Investigator's opinion, is able and willing to comply with all study requirements The presence of any one of the following exclusion criteria will lead to the exclusion of the subject: * History or current diagnosis of haematological malignancy (including bone and lymph) * Inadequate use and understanding of the English language, requiring a translator HEALTHY COHORT Subjects fulfilling all of the following inclusion criteria are eligible for the study: * Age ≥18 years old at the time of study entry * Can provide written informed consent * Have an NHS number (to enable ordering and tracking of laboratory FBC tests) * Registered with a GP * In the Investigator's opinion, is able and willing to comply with all study requirements The presence of any one of the following exclusion criteria will lead to the exclusion of the subject: * Inadequate use and understanding of the English language, requiring a translator * Been hospital…