Charles married Frides in a Register Office in 1912. One of their daughters was Rosina whom I actually met in 2014 when she was then in her eighties!
542 shows the couple with their two children Charlie and Dolly
in the 1939 General Register document below (849), we see the family in 1939 but it looks like Charles Edward Walker is written there as Edward Charles.
Archive: 542
Some relevant entries from the Archive:
Rear of photo 775 shows it was taken at Southend-On-Sea [775a], the rear of 542 shows their third child Rosina's writing [542a], Possibly at Ivimey Street 1913 [959], General Register 1939 showing Walker family in Tottenham N17 [849], Probate [958]