Fiendishly obscure question: Id this (American?/Canadian?/British?) sports announcer: 1948 London Olympics

You can hear the audio here at about 1:12:37. Raymond Glendenning hands off announcing duties to [Stewart McClussen?]. That’s an approximation of what I’m hearing. Just can’t make out that last name. For all I knew it might be Laurel or Yanny.

The captions read “Stewart MacPherson”.

Well, cool, thanks. Didn’t see captions, but that’s actually the only name I was coming up with that even remotely sounded like what I was hearing.