Participants randomised to the TDR group:Will be asked to discontinue with all glucose lowering therapies before the baseline study, as previously advised for a recently published study with similar intervention (of 8 weeks). Metformin and Sulphonylureas are to be discontinued 72hours prior to initiation of TDR. DPP IV inhibitors 2, GLP-1 therapies and SGLT2s will be discontinued 2 weeks prior to the initiation of the TDR. Antihypertensive drugs will be stopped on the day the TDR is commenced. This is a safety measure because blood pressure is likely to fall substantially (mean drop in SBP ~ 20mmHG) on the diet. Medication will be adjusted DiRECT study protocol (see supplementary material) however, individual clinical decisions may be necessary for a patient's best interest and therefore any alterations to medication are ultimately made at the discretion of the study clinician(s). Blood pressure will be monitored throughout the study at the clinical review sessions as per the DiRECT protocol. Treatments for other conditions and primary prevention of cardiovascular disease (e.g. statins) will be continued. This will be discussed in detail and decided upon at the level of the individual, at the initial consultation. Furthermore, their medical history will be taken and any participant with a history of constipation other bowl related problems will be prescribed a fibre supplement i.e. fybogel to help to prevent its occurrence. We will ask participants to continue with their habitual levels of physical activity throughout the course of the study.