The BBC's decision to sack Scott Mills came after a 2016 police investigation into 'serious sexual offences' against a teenage boy, the Daily Mirror has reported.
The Radio 2 DJ, 53 - who was stunningly axed by the broadcaster on Monday - was questioned by police at the time but no charges were brought and the case was dropped due to a lack of evidence.
A representative for Mills declined to comment when approached by the Daily Mail.
A spokesperson said: 'In December 2016, the Met began an investigation following a referral from another police force. The investigation related to allegations of serious sexual offences against a teenage boy.
'These were reported to taken place between 1997 and 2000. As part of these enquiries, a man who was in his 40s at the time of the interview, was questioned by police under caution in July 2018.
'A full file of evidence was submitted to Prosecution Service, who determined the evidential threshold had not been met to bring charges. Following this advice, the investigation was closed in May 2019.'
It comes after Mills - one of the BBC's biggest and highest-paid stars - was reportedly sacked following an allegation made against his 'personal conduct', relating to a 'historic relationship' dating back more than 10 years.
The BBC has declined to comment on the issue further since his dismissal was announced on Monday.
The decision to sack Scott Mills, pictured this month, came after a 2016 police investigation into 'serious sexual offences' against a teenage boy, the Daily Mirror has reported
Mills pictured enjoying a boozy night out with Alan Carr in 2009. The BBC Radio 2 DJ has worked at the corporation for more than two decades
A Spokesperson said: 'While we do not comment on matters relating to individuals, we can confirm Scott Mills is no longer contracted to work with the BBC.'
The DJ recently talked about never knowing when his career would end just a month before his BBC axing.
Mills admitted in recent years he had been branching out into TV projects outside of his 'natural environment'.
In an exclusive interview at the Attitude 101 event in February, he reflected on his 25-year career in radio, saying: 'You never know when all this is going to stop.'
Referring to his appearances on 's The last year and the BBC's Come Dancing in 2011, he added: 'Why am I doing all these mad things? It's not really like me at all. I'm trying to do them so it makes everything else less scary.
'I'm just trying to do it all. You never know when all this is going to stop, so why not do it?
'Who gets to do the things I've been doing? It's mad. So I truly believe that even if something terrifies you, do it.'
The star admitted he should have been fired for presenting his Radio 1 show while drunk - long before his shock sacking by the on Monday.
The broadcaster had a difficult relationship with after one of his first serious boyfriends died following a drug overdose.
Mills dealt with the pain by drinking heavily, sometimes a bottle of spirits per day before work, and later admitted being drunk on air when on the night shift.
He leant heavily on celebrity friend , who also struggled with alcoholism - but Mills said true stability only came in recent years when he met his husband Sam Vaughan.
The couple married in 2024 after winning the celebrity version of BBC hit show .
Mills is paid between £355,000 and £359,999 a year by the BBC.
The star, who has suffered from chronic anxiety, and panic attacks all his life, revealed previously how he was lucky not to be sacked in 2001 when his boyfriend Mitch died suddenly - but the BBC cared for him.
The star explained how his grief and loneliness whilst presenting Radio 1's early morning show saw him turn to alcohol, describing how he'd 'wake up at 2.30am, do the show, come home and go back to sleep'.
He went on: 'Then I'd wake up in the evening and drink two bottles of wine or a bottle of spirits in front of the TV. It was a way to escape.'
Mills pictured with Emily Atack at his house in 2012. He explained how he regretted participating in some of the shows he had appeared on
The star married his long-term partner Sam Vaughan at a celebrity-studded wedding in Barcelona in 2024. They are pictured at an awards ceremony in February this year
His alcohol problems followed him into work, with the rising star going on air drunk. 'That could have been a massive f***-up for me. Even I would've sacked me,' he admitted. 'But thank God for Radio 1 – they knew about Mitch and why I was having a bad time. It was a proper wake-up call.'
Mills, who also presents the BBC's Eurovision coverage, was taken off air last Tuesday while bosses looked at the claim before announcing his dismissal today, telling the Daily Mail in a statement: 'While we do not comment on matters relating to individuals, we can confirm Scott Mills is no longer contracted to work with the BBC'.
Veteran DJ Gary Davies with Vernon Kay the bookies' favourite to take over full-time.
Mills joined the BBC in 1998 after starting his career in local radio at home in Hampshire at the age of 16 but his 28-year tenure at Radio 1 and then Radio 2 has not been without controversy.
In 2003 though Mills would again let his drinking cross over into work, famously turning up to his early morning show at 4am whilst still audibly 'really, really drunk' after partying at the Brit Awards until 2.30am.
His producer was forced to get a hotel manager to let him into the star's room to physically wake him after he failed to turn up to work.
'I absolutely should not have gone on air,' Mills admitted at the time.
'The producer was telling me to sit there, play another song and not say a word while she made me a coffee.
'But as soon as she left the room I was slurring away. I couldn't even say artists' names properly.'
Mills admitted he was 'very lucky to walk away with my job, but it did teach me a lesson and I've not done anything like that since', before quipping that 'that show has become part of Radio 1 folklore'.
A year after the drunken incident he was moved from the Early Breakfast Show and given the Drivetime slot.
After eight years he swapped timeslots with Radio 1's rising star, Greg James, and was effectively demoted to the 1-4pm show.
Mills admitted at the time that losing the covetable Drivetime slot to Greg in 2012 was 'like a punch in the stomach'.
The star carried on at the station for another decade though, eventually leaving after 24 years to replace Steve Wright on Radio 2, where he was replacing Zoe Ball on the Breakfast Show.
Mills declared after winning the top job that it capped the 'best year of my life'.
Four months before being announced as the new Breakfast Show host, Mills had allowed fans into his personal life as he competed on the popular BBC show Celebrity Race Across The World with his husband Sam.
The show aired weeks after Mills announced he had married his boyfriend of eight years in a star-studded Spain ceremony in front of his radio pals Zoe Ball, Rylan Clark and Jordan North.
Race Across The World viewers watched as Mills and Sam opened up about their at times tumultuous relationship on the show, revealing how brand manager Sam had initially turned down the star.
A senior broadcaster at the BBC has said there is 'total shock' at the corporation after Mills's sacking. There were apparently 'audible gasps' from staff as they were told on Monday morning in an email from BBC director of music Lorna Clarke.
Several stars who have spent time with him described him as 'kind and generous' and that friends are 'devastated' for him. He was described by a radio colleague as 'hugely popular' internally.
'It is not like the BBC to act so fast', a household name broadcaster told the Mail.
Another source claimed that wild rumours are flying around Broadcasting House about the reason for his sacking.
'No suspension period or prolonged investigation does not bode well', another insider said.
BBC News' Senior UK Correspondent Sima Kotecha said on the channel this afternoon that Scott's sacking is the biggest departure since Huw Edwards left in 2024.
'Now this is mega news. We heard gasps in the newsroom when people realised that he had been sacked', she said.
The former Radio 2 DJ admitted in recent years he had been branching out into TV projects outside of his 'natural environment' including Bake Off, pictured
'We don't know why he's been sacked but we do know that it will surely be unwelcome news. The fact that the bosses had to do this means there must be something potentially very significant here to let one of their big names go.
'As I said, this is a huge name in the BBC. We know what happened to Huw Edwards and how he left the organisation because of what he had done. We are now asking questions about another mega star at the BBC who was on between £355,000 to £359,000 per year. This will be unwelcome news. There will be many questions'.
At the start of his show on BBC Radio 2, Jeremy Vine said he was 'taken aback' by the news about Scott Mills. He said: 'Obviously, I was taken aback by that opening story to the news.
'I had not heard anything about it until 17 minutes ago, when it was on the BBC website, and I only had the information that was given to you in the bulletin, I have nothing more, that it was allegations about Scott Mills's personal conduct, which have led to him being sacked.
'I have no more than that. Alright, on to today's show.'
Lorna Clarke, Director of Music, told BBC staff in an email: 'I wanted to personally let you know that Scott Mills has left the Breakfast show, and the BBC. I know that this news will be sudden and unexpected and therefore must come as a shock.
'Not least as so many of us have worked with Scott over a great many years, across a broad range of our programmes on R1, 5Live, R2 and TV. I felt it was important to share this news with you at the earliest opportunity.
'Of course, it will also come as a shock to our audience and loyal breakfast show listeners too. I will update everyone with more information on plans for the show when I'm able to. While I appreciate many of you will have questions, I hope you can understand that I am not going to be saying anything.'
