Transport for London has apologised to a woman they fined for forgetting to pay the £11.50 congestion charge - a day after she had a miscarriage.
Cairis Hickey appealed against the £250 fine on the grounds that she was overwhelmed by grief and forgot to pay, but this was rejected by TfL.
The refusal letter read: "You mentioned that everything else was forgotten in your grief.
"Whilst Transport for London recognises that this must have been a distressing time for you, there is a responsibility for the appropriate charge to have been paid for the use of a vehicle on a road within the Congestion Charge Zone.
"We have considered fully the issues raised and have decided that on this occasion we are unable to exercise discretion and the PCN will not be cancelled, as the charge could have been purchased in advance."
She posted a photo of the rejection letter on social media, captioned: "Thank you TfL for acknowledging my miscarriage would have been 'a distressing time' & I'm sorry that whilst I was pregnant I did not pay for the congestion charge before anticipating that I would miscarry. I can assume D.Milton is a man."
An extract of the letter was posted online by Ms Hickey
The post drew the attention of London Mayor and TfL boss, Sadiq Khan, who said an apology would be issued and the fine waived.
Ms Hickey said that within an hour of Mr Khan's involvement in her case, the fine had been revoked and that she had also received an apology.
He called for staff to deal with future appeals of a similar nature with the "humanity they deserve".
Mr Khan wrote: "I have also asked them [TfL] to ensure issues like this are treated with the sensitivity and humanity they deserve in future."