I thought I would share the following nominal roll entry that I've been working on:
Ormandy, Raymond; Taken on strength in 15 Field Regiment RCA on 15 Feb 1951, appointed Lance Bombardier on 21 Jun 1951, appointed Acting Bombardier on 29 Nov 1951, confirmed Bombardier on 1 Feb 1953, appointed Acting Sergeant on 1 Feb 1953, proceeded on Special Duty to Canadian Coronation Contingent (in the rank of Bombardier) from 21 Apr to 2 Jul 1953.
The Part II Orders do not specify if Bombardier Ormandy was in the marching contingent or lined the route in London. In fact, he may well have actually been part of the Ottawa celebration. More history to discover!
Following photos from http://live.cpac.ca/Event/The_Coronation_of_Queen_Elizabeth_II