The education secretary has hit back at vice-chancellors who accused the government of acting unlawfully in its attempts to curb the use of “conditional unconditional offers” at universities.

Damian Hinds has said it is a “shame” that universities are still justifying giving out guaranteed places to students, regardless of A-level results, as long as they make them their first choice.

Eight universities have stopped or will stop offering "conditional unconditional" offers to prospective students, but a number of institutions have not yet made a change.

The minister’s comments came after academics accused the government of unlawfully threatening their autonomy when he called for a review of university admissions.

Mr Hinds wrote to 23 of the worst-offending universities, including a Russell Group institution, calling on them to stamp out “pressure-selling tactics” last month.

Student news in pictures Show all 34 1 /34 Student news in pictures Student news in pictures South Korean policemen detain a student demonstrator during a protest against South Korean President Park Geun-Hye EPA Student news in pictures South Korean policemen detain student protestors during a protest against South Korean President Park Geun-Hye outside the National Assembly in Seoul, South Korea. The protesters demanded that the parliament takes steps to impeach President Park Geun-Hye EPA Student news in pictures Filipino demonstrators face off with anti-riot police during a protest near the US Embassy in Manila, Philippine EPA Student news in pictures Hundreds of protesters including Indigenous People, students and militant groups marched towards the US Embassy to protest against the presence of US military troops and condemning the violent dispersal which left at least forty people hurt including twenty police officers and three people who were run over by a police van EPA Student news in pictures A federal judge in Mexico has ordered that a once-fugitive police chief be held on charges of kidnapping in the disappearance of 43 students Student news in pictures A man holds up a photograph of a missing student with a caption reading 'We are missing 43,' during a meeting marking the 25-month anniversary of the disappearances of 43 students in the southern state of Guerrero, in Mexico City. A federal judge in Mexico has ordered that a once-fugitive police chief be held on charges of kidnapping in the disappearance of 43 students AP Student news in pictures Miguel Perez, an intern student from the University of Puerto Rico School of Medicine, puts away his cell phone before walking into the operating room at the Dr. Isaac Gonzalez MartÌnez Oncological Hospital in San Juan, Puerto Rico. Once they complete their general surgery training, many residents are moving to the United States in search of better wages, one of the main factors linked to the current shortage of specialists in the Island Student news in pictures Fewer EU students have applied to start university courses in the UK next autumn. There was a 9% fall in the numbers who had applied for courses, according to admissions service UCAS. PA wire Student news in pictures University students protest against President Nicolas Maduro, in Caracas, Venezuela. Masses of protesters jammed the streets of Venezuela's capital on the heels of a move by congress to open a political trial against Maduro, whose allies have blocked moves for a recall election AP Student news in pictures University students protest against President Nicolas Maduro, in Caracas, Venezuela AP Student news in pictures Thousands, most of them high school students, march during a demonstration in Madrid, Spain, on a one day strike to protest about the country's education law that increases the number of annual exams AP Student news in pictures Students gather on the west mall to confront the Young Conservatives of Texas student organization over a controversial bake sale on The University of Texas campus in Austin, Texas. The Young Conservatives of Texas chapter at the University of Texas-Austin sparked the protest with an affirmative action bake sale. The club encouraged students to buy a cookie and talk about the disastrous policy that is affirmative action Student news in pictures Donald Parish Jr, right, confronts Electrical and Computer Engineering senior Dewayne Perry over a controversial bake sale on The University of Texas campus in Austin, Texas. The Young Conservatives of Texas chapter at the University of Texas-Austin sparked the protest with an affirmative action bake sale. The club encouraged students to buy a cookie and talk about the disastrous policy that is affirmative action AP Student news in pictures Brigham Young University announced that students who report sexual assault will no longer be investigated for possible violations of the Mormon-owned school's strict honor code that bans such things as alcohol use AP Student news in pictures Students of secondary education march to protest against the final examinations and LOMCE (The Improvement Quality Education Law) law, after a call by trade unions, in Murcia, Spain EPA Student news in pictures South African police have used stun grenades and rubber bullets to disperse hundreds of protesters who had marched to the parliament building to call for free university education, where the finance minister was giving a budget speech AP Student news in pictures Police break up student protests outside the parliament in Cape Town, South Africa Reuters Student news in pictures South African Policemen fire rubber bullets at student protestors in Cape Town, South Africa AP Student news in pictures A student protestor is hit by a rubber bullet in Cape Town, South Africa AP Student news in pictures An injured student is helped by colleagues during protest outside the parliament during South African Finance Minister Pravin Gordhan's medium term budget speech in Cape Town, South Africa Reuters Student news in pictures Plaintiffs and bereaved families of elementary school students killed in the tsunami that followed a major earthquake in northeastern Japan in 2011, show banners that say 'victory in a suit filed with the Sendai District Court' in Sendai. A Japanese court ordered municipalities to pay $13.7 million dollars to families of school children who were swept away to their deaths by the 2011 tsunami Getty Student news in pictures A group of student at Ewha Womans University calls for a thorough investigation into those involved in years of engagement with state affairs backstage by Choi Soon-sil, a personal confidante of South Korean President Park Geun-hye, at the school's front gate in Seoul, South Korea EPA Student news in pictures Students raise placards during a strike action called by the student union, in Madrid against university entry exams Getty Student news in pictures Libyans throw a newly graduated student into a fountain as they celebrate during the graduation ceremony for students from the Faculty of Pharmacy at the Al-Arab University in the eastern Libyan city of Benghazi Getty Student news in pictures Libyans celebrate as they attend the graduation ceremony for students from the Faculty of Pharmacy at the Al-Arab University in the eastern Libyan city of Benghazi Getty Student news in pictures Libyans celebrate as they attend the graduation ceremony for students from the Faculty of Pharmacy at the Al-Arab University in the eastern Libyan city of Benghazi Getty Student news in pictures Thousands of Thai Catholic students take part in mourning tributes and in singing the Thai Royal Anthem to honour late Thai King Bhumibol Adulyadej at Saint Dominic School in Bangkok, Thailand EPA Student news in pictures Students of Silpakorn University paint portraits of the late Thai King Bhumibol Adulyadej at the university campus in Bangkok Getty Student news in pictures A student of Silpakorn University paints a portrait of the late Thai King Bhumibol Adulyadej at the university campus in Bangkok Getty Student news in pictures St Andrews University students take part in a foam fight known as Raisin Monday in the Lower College Lawn behind St Salvator's Quadrangle following the Raisin Weekend PA wire Student news in pictures St Andrews University students take part in a foam fight known as Raisin Monday in the Lower College Lawn behind St Salvator's Quadrangle following the Raisin Weekend, an annual tradition where student 'parents' inflict tasks on the unfortunate first-years they have adopted as 'children' as part of a mentoring scheme PA wire Student news in pictures Students at the Cuba's National Ballet School (ENB) in Havana, Cuba Reuters Student news in pictures Students at the Cuba's National Ballet School (ENB) take part in a practice in Havana, Cuba Reuters Student news in pictures Students at the Cuba's National Ballet School (ENB) wait in line to enter a classroom in Havana, Cuba Reuters

Seven other institutions have also pledged to review their use of these offers, the Department for Education has said.

Mr Hinds said: "While I am pleased that many university leaders are taking the issue seriously, it is a shame there are still some trying to justify practices which are damaging the integrity of our higher education and students' interests. I make no apology for speaking out as I have done."

The education secretary added that he could not “stand idly by watching questionable practices spread and educational standards slide.”

“Universities are making billions of pounds in public funds, as well as students' own contributions, and I have a responsibility also to sixth form teachers, who want all their students to have the same incentive to reach their best,” he said.

A spokesperson for Universities UK (UUK) said: “There are clear benefits for students in universities being able to use a variety of offer making practices that reflect the individual student’s circumstances and potential.

“As with all offers to study at university, universities must be able to explain why and how they award unconditional offers with conditions attached. We are already working together with Ucas, reviewing existing guidance and gaining a better understanding of how these offers are being used.”