I have very strong reservations about live donorship. There are massive discrepancies between the information given to potential donors in this country and elsewhere (for example in the USA it is accepted that living donation of a kidney can lead to a greater strain on the heart, ongoing mental health issues, and donors are given priority placing on the waiting list as their remaining kidney is more likely to fail) and there is nothing like enough safeguarding to ensure against coercion, even done in all innocence. Counselling and consent should be given before the process starts to ensure that all potential donors aren't under pressure from family - unfortunately I've heard of families being tested and a sibling identified as suitable, at which point the expectation is donation whether they are happy with the process or not.
That doesn't mean I think it shouldn't happen - there are three people who'd get one of my kidneys in a heartbeat - but the way the system works needs to be administered in a better way to safeguard potential donors and the risks honestly explained.