The purpose of the Electronic Patient Self-Reporting of Adverse-events: Patient Information and aDvice (eRAPID) programme is to determine whether eRAPID (an online system for patients to self-report symptoms and side effects) can enhance patient care and improve the safe delivery of cancer treatments. The investigators hypothesise that patient symptoms will be detected earlier with more timely admissions and a reduction in overall hospital contacts. It is predicted that staff will save time recording symptoms and side effects and will be able to focus attention during clinical contacts on more severe side effects. eRAPID is a cost-effective approach to supporting patient self-management and reducing hospital/General Practitioner (GP)/community contacts.