There are more medications that you can try like lisinopril and others, it is a matter that your GP or consultant should be looking into. It is hard to do but losing weight will also help and certain foods they tell you to try and cut out of your diet, sometimes renal function can stagnate for a time. My renal function stopped at around 20% for 7 years know one can explain why it happened but it did, kidneys function can go up as well as down but if you are not on a fluid restriction drinking water to flush the kidneys out can help. Diabetes causes the kidneys to fail but in life there are things that happen to our diabetes which can make it unstable such as stress effects diabetic control and therefore can damage the kidneys. In some ways diabetes makes you eat certain foods to help maintain a good BG level but these foods may effect your kidney function so it is a catch 22. There are many renal consultants in the country but you need to find a hospital that does transplants and i am sure Manchester is one of them but at the time of needing to go on the list your renal and diabetic consultant will invite you to a meeting. When i went there was both consultants as well as a transplant doctor and nurse, you will have to go for many test ECG, blood,scans and a test where you are on a exercise bike with a mask on to see if the heart can take the strain of the transplant. You have to do these every year as a pre op assessment, my own personal experience was that i move all my care to the Freeman hospital at Newcastle. I changed my diabetic doctor from Durham hospital to a one who was involved with transplants and then moved all my care there as they were not getting letters but once its under one roof everything was better. It is about 30 mins drive to the Freeman from a 5 mins drive to Durham but the care was on a different level.