 The proportion of elderly patients with end-stage kidney disease undergoing renal replacement therapy RRT is steadily increasing. Although kidney transplantation remains the optimal RRT of choice, it is clear that older adults have a differential risk versus benefit profile after kidney transplantation compared to younger adults. No age-adapted immunosuppression for older adults has been shown to improve kidney allograft outcomes but recent sub-analyses of clinical trial data has hinted at improved outcomes for older kidney transplant patients receiving Envarsus versus standard twice-daily tacrolimus formulations. This feasibility study will investigate this effect to see whether a full scale randomised controlled trial is warranted and to provide information regarding study feasibility. 