Ian Hall's kidney helped to save diabetic Deborah Duval

Ian Hall, 28, carried a donor card for 14 years and when he died in 1995 his kidneys, heart, liver, pancreas and eyes were used for transplant.

His mother, Patricia, of Flitwick, Bedfordshire, is addressing an organ donor conference in Japan in May.

"It's a fantastic opportunity for me to exchange ideas on donation and to be an ambassador," she said.

Mrs Hall now works with one of the six people whose lives were saved thanks to her son's organs.

He helped so many people and maybe my purpose now is helping as many people as I can Patricia Hall

Diabetic Deborah Duval was given his pancreas and one of his kidneys. The two women now work together for Body, the British Organ Donor Society.

Mrs Hall, 56, contacted all the recipients of Ian's organs, thinking they would like to know a bit more about the donor.

Mrs Duval, now 43, responded and the pair became friends as well as fellow campaigners.

In Japan, Mrs Hall will also hand out prizes to race competitors who have had transplant operations.

"It started off as a small trip but it's escalated somewhat," said Mrs Hall.

Mrs Hall began her voluntary work to promote the organ donor scheme more than three years ago - six years after Ian died after a car crash.

"When my son died you couldn't describe how I felt." she said.

"I look at it differently now. He helped so many people and maybe my purpose now is helping as many people as I can."

Mrs Hall said organ donation in Japan was perceived differently.

"When people in Japan die it is perceived that their body is unclean and they don't take organs from dead people.

"They do donate organs but they don't receive them. They do live donations out there."