Crime on the Night Tube rose almost a third last year, new figures have revealed.
Violence, sexual offences and theft from passengers were all up on the previous twelve months.
Conservative assembly member Susan Hall, who uncovered the increase through a mayoral question, attacked Sadiq Khan’s “complacent attitude to tackling crime”.
There were 32 per cent more violent attacks on the Night Tube in 2018/19 compared to the previous financial year, rising from 208 to 275 offences.
Reports of sexual assault rose ten per cent last year, up from 56 to 62.
But the biggest increase was thefts from passengers, which rose 50 per cent from 305 to 452.
Trespass and vandalism, robbery, bike and vehicle crimes, and theft of TfL property all fell last year.
Overall, crime was up 27 per cent, with 970 crimes compared to 762 in 2017/18.
The Night Tube has been running for three years, with the first line opened in August 2016, shortly after Sadiq Khan became Mayor.
Trains now run on the Victoria, Jubilee, Northern, Piccadilly and Central lines on Friday and Saturday nights.
But Ms Hall accused the Mayor of “squandering Boris’s golden legacy” by not ensuring the service remains safe.
She said: “Sadiq Khan’s crime epidemic continues to impact on people’s lives in new and worrying ways.
“It is clear that criminals are increasingly moving underground to commit heinous crimes such as theft and sexual assault.”
“What more will it take for this Mayor to drop his complacent attitude to tackling crime?”
The Mayor said Transport for London (TfL) was working closely with the Metropolitan Police and British Transport Police to keep passengers safe.
Responding to Ms Hall’s data request, he said: “London Underground remains a safe, low crime network, with very few people ever witnessing or experiencing crime.”
Offences on the Night Tube made up six per cent of all crime on the Underground last year.
A spokesperson for the Mayor’s Office said the rise was due to an increase in pickpocketing, and more crimes being reported to the British Transport Police through text and online services.
He said: “All tube stations that are open through the night are staffed at all times and TfL has invested in 100 additional transport police officers who are dedicated to policing the Night Tube.”
By LDRS reporter Jessie Mathewson