More than half of the capitals major A&Es failed to meet the Government's four-hour waiting time target.
Six London trusts missed the target at least 80 per cent of the time over the last year, while Barking, Havering and Redbridge University Hospitals Trust missed it every single week.
The London Assembly's Health Committee, which carried out the study, warns that waiting times could get worse this winter as demand for care increases.
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George Osborne told MPs London would shoulder a large part of his 37% reduction in transport funding.
The prison was originally opened in 1852 as a mixed prison before becoming the first female-only local prison in England in 1902.
The victim was travelling between Seven Sisters and Highbury and Islington when she was assaulted.