Yes, you were right, it is a family grave - parents and 2 of their 3 children.
The third (Harold Walker) died in late 1956 and his ashes are supposed to have been scattered at Lawnswood Cemetery.
Questions please:
Do cemeteries keep records of ash scattering?
Is there likely to be a memorial plaque?
As always, thanks to all you knowledgeable people who share your expertise so readily
Jinny