Digitized issues of the London Evening Advertiser and the London Morning Advertiser are now available for free public access. Find them through https://www.crkn-rcdr.ca/en/whats-new-canadiana-collections
The London Evening Advertiser has coverage for 2,927 issues between 1922 and 1932.
The London Morning Advertiser has a scattering of 87 issues between 1923 and 1932.
Canadiana has full-text search enabled for these collections, allowing querying names, businesses, and events. However, search hits are not highlighted on the page. While this might seem like a hurdle, it opens an opportunity for serendipity, or, put another way, the hazard of stumbling into rabbit holes. How else would I know that a US community once tried to ban jazz!
Further editions of these papers for the second half of 1932 are listed as “coming soon.”