The study aims to compare this online PR programme to conventional face-to-face PR as currently delivered by the NHS. The study aims to recruit 106 patients referred for PR from Portsmouth Hospital and local Participant Identification Centres.They will then be assessed for suitability onto PR, consented and randomised onto an arm of the study. 36 will undertake a conventional PR programme as reflected in the NHS, and 70 the online PR programme known as 'myPR'. Pre and post programme measurements including walking distance and quality of life questionnaires will then be compared between each arm of the trial, to ensure that the online PR is not inferior to the conventional face-to-face PR.