We found nothing on this man (too common a name) and even our colleague Andrew Behan who normally digs up good stuff found very little with a certain connection to the plaque:
On 29 September 1939 Charles Saloman Arnold was living as a single man at 43-44 Canonbury Square, Islington and his occupation was Foreign Correspondent.
This section lists the memorials where the subject on this page is commemorated:
Charles Arnold
Charles Arnold, 1 October 1916 - 25 January 2000. 'He loved this garden and w...
Boxer. Started boxing at The Ring, Blackfriars Road. British Lightweight Champion, 1924-25. The picture source gives his fight history and at Rootsweb we found: “... prominent boxer and lightwei...