James,
From FindMyPast, Vera Jessie Brooks was living at 19 Passey Road in 1928, no other person at that address.
Both Vera's were living at 234 Knowle Road in 1929 and in 1930.
When it comes the Charles Deane - there are two - Charles Harald Deane & family living in Hobson Road, Selly Oak, and Edward Charles Deane & family living in York Road, Kings Heath - but none in Knowle Road between 1920 and 1930. To be honest I didn't even know these were on FMP as I have always used Midlands Hiostorical Date in the past. The ones on FMP seem to be for every year between 1920 and 1930.
One thing you must be aware of is that the year relates to October of the previous year when the Electoral Registration Forms must be completed. Hope that helps.
Maurice