Here's an obituary of John Price (I've slit in in two), doesn't say what he died of .
The Times (London)
October 27 1987, Tuesday
Mr John Price, actor, who died on October 23, at the age of 44, had packed an extraordinary amount into a relatively short space: as a classical player for the major companies, and in the provinces; appearances at the Royal Court, the Riverside, and on Shaftesbury Avenue; and work in many television plays and series.
Physically, he was impressive, as commanding in height as in voice. One of his recent parts was Hotspur, by whose light 'did all the chivalry of England move,' in the Bogdanov production of Henry IV, Part I, for the English Shakespeare Company which came to the Old Vic last spring.
Price was born at Worcester on January 27, 1943. He trained as a teacher. His acting career began in 1967 by his touring schools in Shakespeare, and at Great Yarmouth enduring the grind of summer-season.
He went at various periods to more satisfying repertory at Harrogate, Chesterfield, Sheffield, Birmingham, and Nottingham (where), in 1978, he acted Macbeth). He had played at the Royal Court, London (1971), as Moore, the reserve in David Storey's The Changing Room, set in a rugby league dressing room during a game; and at the Globe (1979) he was Brian in Alan Ayckborn's tennis court piece, Joking Apart.