Change how donor livers are shared out, and see what happens to 100 people who join the waiting list.

This is a simulation built from published UK figures, not real patients. The same people and the same donor livers are used every time, so any difference you see comes from what you changed.

1Set the levers 2See a year later 3Pin and compare

Levers

Reset to UK now

Donor livers each month 84

60 UK now 110

Livers retrieved from donors across the UK. About 1 in 5 turns out not to be usable.

Who is offered each liver first

Most benefit
the UK rule Most unwell first
UKELD score Longest waiting
first come, first served By lottery
a fair-draw baseline

This decides who is offered the liver. How people fare without a transplant is estimated separately and does not change here.

Livers from DCD donors 48%

20% UK now 70%

Donation after circulatory death. These livers are offered by a different route and more often cannot be used.

Offers the transplant team declines

A liver may be offered to several people in turn before it is accepted. In the UK about half of offers are declined for the named patient.

People joining the list each month 68

50 UK now 90

Adults joining the routine list. The most urgent groups are set under More settings.

Everything: open the full simulator ↗

A year after joining the list

UK now

Average of 10 runs

Of every 100 people who join the list:

63transplanted
UK figure 64

24still waiting
UK figure 23

5removed from the list
UK figure 5

8died or became too unwell for a transplant
UK figure 8

Typical wait to transplant

4½ months

median · UK 130 days

Waiting at any one time

about 610

UK 613 on 31 March 2026

Livers that could not be used

about 1 in 5

UK 15% of DBD, 32% of DCD

Across 10 runs, between 61 and 66 of 100 were transplanted within a year. Why do runs differ? Full statistics ▸

Watch this run unfold See the list week by week: people joining, livers arriving, and who is offered each one. Optional, and it opens the animated view you may know from the full simulator.

Compare: A against your current levers

Appears once you pin an A. The same 100 people and the same livers run in both.

A · UK now 63 · 24 · 5 · 8

B · 95 livers a month 69 · 19 · 5 · 7

+6 transplanted −5 still waiting 0 removed −1 died or too unwell

With 95 donor livers a month instead of 84, six more people in every 100 are transplanted within a year, and one fewer dies or becomes too unwell. Only the supply changed. Nationally that would be roughly 55 more transplants a year.

For education and research only. Must not be used to make or influence decisions about any individual's clinical care, listing or organ offers. Built by the Edinburgh organ allocation research group.