Forty yards south of this building on the east side was the site of The Foundery, John Wesley's headquarters 1739 - 78 and the first Methodist Book-room. The mother of the Wesleys died there 30th July 1742.
Erected by the British section of the International Methodist Historical Union.
Note: other sources seem agreed that Susannah died on the 23rd not the 30th of July.
Site: The Foundery (1 memorial)
EC2, Tabernacle Street
The site of The Foundery is a short distance away; the 1746 map shows a building on the south-east corner of what is now Tabernacle Street and Bonhill Street, marked "Meth M" for Methodist Mission we guess.
We can't explain why this plaque is not on that site, nor why it is on this building rather than any of the others closer to the correct location. And, 2015, Londonist report that it's missing.