It is never too late to decide.. 
INFO.
  
   Every  year about  600,000 people in the UK die. But only about 6,000 are considered  ‘eligible donors’—meaning they’ve died under the right  circumstances and aren’t medically unsuitable for a transplant. 
    
  .....Last  year only about 1,600 deceased people actually became donors, the  drop-off mainly due to further medical concerns, hurdles,  or not getting consent from their families. People can donate more  than one organ, and last year around 4,000 transplants took place  from deceased donors. 
  ....Donations  after death are more common than living donations, but they’re still relatively rare because they  can only happen when people die in certain circumstances, and are  medically suitable for a donation. 
  
  ....Donations  after death are more common than  living donations, but they’re still relatively rare because they  can only happen when people die in certain circumstances, and are  medically suitable for a donation. 
  ..
  .There  is a shortage of  organs available for transplant in the UK causing some people  dying  waiting.
  ...
  In  2017/18. Around 400 people, died  while waiting for a transplant,  A further 755 were removed  the  list, mostly because they had become too ill.  Many of those patients would have died shortly afterwards, but we  don’t know about their circumstances after leaving the list.
  
  ....
  Meanwhile around 6000 people are  currently waiting for an organ in the UK.
  
  ...
  In England, and possibly other countries, doctors need to get consent before  they can remove organs from someone for a transplant. They aren’t  allowed to do so if the deceased person had previously refused  consent. If no view had been expressed either way, consent is sought  from an eligible relative. 
  
  ...
  There  are lots of barriers to  an organ transplant taking place. The most significant ones are based  on whether the patient was on ventilation before death, and whether  the patient’s medical condition is suitable. Only if those tests  are passed is consent sought from relatives of the deceased. 
  ...
    Families  don’t give consent for a variety of reasons.  The most common include the patient having previously expressed a  wish not to donate, when the family aren’t sure what the patient’s  wishes would have been, the family feeling the process would take too  long, and not wanting surgery done to the body. 
    
  
 ...Increased  consent rates don’t always guarantee more transplants. The  transplant system has to be able to cope with an increased caseload.