Caitlin, I'm pleased to say that it's a definite match

Some written notes I found. Info taken from certificates I no longer have access to.
Son of Ernest Cameron & Helen Lane....
Ernest Alfred Cameron b18 Oct 1921 Callander
Ernest Alfred, 21yrs, married Catherine Maxwell Patrick, 19yrs on 28 Oct 1942, Larkhall
Ernest Alfred occ at time of marriage was a Bakers Van salesman
Also mentioned as now engaged in War Service, Aircraftman Royal Air Force
H/A as 11 Leighton Pl, Callander
I haven't kept note of death date or place.
Catherine, 19yrs
Occ waitress
H/A 2 Hillview Cres, Larkhall
Again not kept note of death date
Ernest Cameron married to Helen Lane
Died 26 Feb 1944, 72yrs. Ernest possibly died at 11 Leighton Pl, Callander.
Informant on death record as daughter Winifred O'Donnell. Winifred died 1966.
Occ at death as retired Estate Worker, occ 1942 on son Ernest's marriage record as Forester retired
Widow of Helen Lane
Helen Lane, died aged 52,1940 Callander
I have Helen as being English
Parents as John Cameron & Margaret MacDonald both deceased at time of sons marriage
John Cameron, 26yrs, married Margaret McDonald, 26yrs, 31 Jul 1874, Perth
Occ At time of death as farmer, also as Mason
Johns parents as Duncan Cameron & Jane Adam
Margaret's parents as Alexander McDonald & Jane Lowrie Brown M.S Wilson
Margaret's occ Machinist.
Duncan Cameron & Jane Adams married 6 Sep 1841 no town noted
Duncan's occ Sailor, seaman
Hope above helps.
If your interest in Margaret Maxwell Patrick's branch let me know.
Fiona