From the Portsmouth Evening News 7 March 1959, there was mention of a John George Sutherland, aged 25. He had his driving licence taken away due to drink driving and he was applying to the court to have it back.
So following through on the numbers, this John George would have been c. 18 in 1952 when he took part in the funeral procession.
So expanding the search back in Caithness brings up this birth:
JOHN GEORGE C SUTHERLAND
1933
036/ 7
Dunnet
And there we also have the additional middle letter of 'C', which gives us J G C Sutherland mentioned earlier.
Monica