The family of a taxi driver who died when part of a building collapsed onto her car says they "owe it to her" to find out what happened that night. 49-year-old Julie Sillitoe died when storms and high winds hit central London on 14 February.
Speaking to ITV News, her husband Steve Sillitoe said: "we don't live in a third world country, and buildings don't just collapse."
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The London mayor publicly backed defeated candidate Owen Smith in the contest which saw Mr Corbyn re-elected party leader.
Police described it as a "growing sink hole" and it's unclear when the road will reopen.
The victim, in her 30s, was sitting in a garden in the early hours of the morning when a man leapt over the fence.