Brewer married Marjorie Hirst, who he met during a
Compound Fracture reduction in Normandy. They had five children, John, Christine, Jane, Peter and Bill. He was a keen
angler, starting the hobby at the age of 10 and continuing until near the end of life. He estimated that he had caught more than 25,000 fish during his lifetime. In 1966, he caught five salmon in 45 minutes on the
River Eden, Cumbria. At one time, he caught a
rainbow trout weighing 13lb, a record for the time. As a member of the
Athenaeum Club, London, Brewer made contributions to their committees, particularly in the library committee and its financial stability. He was a collector of antique clocks and old Liverpool pottery, and an active member of the Antiquarian Horological Society. He authored
The death of kings: a medical history of the kings and queens of England which considers the likely cause of deaths of past kings and queens of England. ==Selected publications==