Marjorie Fletcher, the daughter of Percy Vincent Fletcher and Mabel Bradley, married M. E. Robertson per Percy's obituary. Here's what I've been able to track down so far.
Melvin Edward Robertson
DOB: 8 Nov 1924 (Where?)
DOD: 17 Sep 2007 Ontario, Canada (Click here for Find A Grave memorial)
DOM: 29 Mar 1944 (Where? Most likely Ontario, Canada)
DOB: 26 Jun 1921 Stalybridge, Cheshire, England
DOD: 18 May 1989 Canada (Click here for Find A Grave memorial)
Click here to find Melvin's obituary online. The obituary includes a lovely photograph of Melvin and Marjorie and a complete list of family members.
I'm pursuing an obituary for Mabel Bradley Fletcher for confirmation of this info. However, without a complete date of death, it could take a while to track down the obit.