[Sergio Luis dos Santos]

I have lost all contact with Vince Holyoak (author of book On the Wings of the Morning), no responses from emails and also letters. He gave me a great help when researching Cosme Gomm career in RAF and RAAF. I never knew if he got back the package with the photos he loaned me.
Can someone in England try find what happended to him? Address I have is in Leicestershire.
Thanks in advance,