From a 1995 episode of BBC One's "TV Heroes" hosted by none other than Danny Baker, here's a biography of Deryck Guyler (1914–1999):
Guyler starred in many of Henry Reed's radio plays for the BBC Third Programme in the 1950s, famously voicing General Gland ('Did you press the tit?') in the Hilda Tablet plays.
Guyler's greatest credit may have been in Reed's radio production of Jules Laforgue's Hamlet: or, The Consequences of Filial Pity (1954), in which he played "A footman, a halberdier, a wedding guest, the first grave digger, an attendant lord, Yorick's skull, a theatrical director, an equerry, the King of Denmark, and a tree."