The Government stands accused of giving rapists a "get out of jail free card" after almost 3,000 were given a sentence of six years or less since the Tories came to power.
A new analysis of Ministry of Justice figures shows the overall number of rapists sent to prison has also halved since 2010, with 537 put behind bars in 2020 compared to 1,058 ten years ago.
A total of 2,991 attackers were imprisoned for six years or less - a figure which includes 36 jailed for a mere 12 months or less.
Ministers are under increasing pressure to do more to protect women in the wake of the kidnap, rape and murder of 33-year-old Sarah Everard at the hands of police officer Wayne Couzens on March 9, as she made her way home at London's Clapham Common.
A staggering Crown Prosecution Service report published in June revealed just 3% of reported rapes led to a prosecution in 2019-20 - an historic low and a worrying 10% drop since 2015-16.
Labour ’s Shadow Justice Secretary David Lammy, whose team carried out the research, called for a dedicated ministers for survivors of rape and sexual violence and a minimum seven-year sentence.
“Over the past 11 years, the Conservatives have been handing out thousands of 'get out of jail free' cards to rapists," he said.
“Labour would reverse this sickening record with measures to reverse record-low conviction and prosecution rates, as well as a new minimum sentence for rape of seven years. Victims must finally be put first in our justice system.”
The Government's Rape Review, published earlier this year, outlined new measures such as pre-recording a victim's evidence to spare them the trauma of a courtroom trial and a greater focus on suspects' behaviour, but some charities view the document as a missed opportunity for more radical reform.
Jayne Butler, chief executive of Rape Crisis told the Daily Mirror it was among the organisation prepared to hold the Government to account "until we see the vital change so urgently needed", adding of the analysis of the figures: “These are the latest in a long string of official statistics that illustrate plainly how our criminal justice system in England and Wales is completely failing survivors and victims of child sexual abuse, rape and all forms of sexual violence.
"With the release of its Rape Review last month, the Government itself acknowledged these systemic failings and apologised for them, recognising that significant change is needed.
"These acknowledgements are important but they must now be followed by urgent, radical and meaningful action, properly resourced and invested in."
The report comes after Victims Commissioner Dame Vera Baird said that the country was facing the effective "decriminalisation of rape" due to the "catastrophic" decline in prosecutions.
There were 1,557 prosecutions in England and Wales in 2020-21, a huge 25.9% drop from 2,102 prosecutions in 2019-20.
Justice Secretary Robert Buckland has said previously that ministers were "deeply ashamed" of the low prosecution rates and that the Government's review showed that "at all stages of the criminal justice process frankly a failure to deal with complaints made by many thousands of victims".
"The first thing I think I need to say is, sorry - it's not good enough," he said in June.
A Ministry of Justice source did not dispute the analysis but told the Mirror that statistics also showed the average prison sentence for rape had increased by a quarter since 2010.
He said: "Since the voters removed Labour from government, the average prison sentence for rape has increased by a quarter and now stands at nearly a decade behind bars.
"The government has also introduced legislation to end the automatic halfway release of rapists sentenced to up to 7 years in prison but sadly, David keeps voting against this. Under Labour, a rapist sentenced to seven years in jail would be back on the streets in three and a half."
