Just going thru the list in Morgan and Shacklady, I have counted 13 structural failures so far and I am only halfway thru the Mark I list.
It was serious enough that X4228 went to Farnborough on 24-8-40 to be used in testing to discover the cause of wing structure failures.
On a side note, X4181 on 17-840 was designated in 616 Squadron for "100 Octane Testing" and was shot down by a Bf-109 on 26-8-40.
Should have read this list earlier!!
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