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BBC News understands that the star phoned BBC head of television, Danny Cohen, to report the incident. Producer Oisin Tymon, with whom the altercation took place, is not believed to have filed his own complaint. Interviews are expected to be held with the star and other parties next week, and the show has been taken off-air. Clarkson has expressed regret over the incident, which his co-presenter James May labelled "a bit of a dust-up". An online petition calling for the star's reinstatement - set up by political blogger Guido Fawkes - has accrued more than 800,000 signatures since Tuesday. Speaking to reporters on Friday, Clarkson said he is "very grateful to everybody" who has signed the petition. Top Gear is one of the BBC's most popular and profitable TV shows, with an estimated global audience of 350 million. Its success is largely attributed to the contentious host, who has appeared on the show since 1988. Politicians on all sides have weighed into the affair, with Prime Minister David Cameron - a friend of Clarkson - saying he hoped the incident could be "sorted out". "It's a great programme and he's a great talent," he said. A lawyer for Mr Tymon said his client "intends to await the outcome of the BBC investigation and will make no comment until that investigation is complete". Pre-emptive Clarkson's approach to BBC bosses suggests he was trying to pre-empt any official complaint. The incident, at a Yorkshire hotel, is reported to have been witnessed by members of the public, as well as some of the production team. The presenter, 54, was given what he called his "final warning" last May after claims he used a racist word during filming. He later apologised for the incident which, although never broadcast, had been leaked to a tabloid newspaper. Last year, Top Gear was also censured by Ofcom for breaching broadcasting rules after Clarkson used a derogatory word for Asian people during its Burma special programme. A further incident during shooting in Argentina saw the show's executive producer, Andy Wilman, brand 2014 an "annus horribilis" for his team. Clarkson, and co-presenters May and Richard Hammond, are due to renegotiate their contracts next month.
Top Gear host Jeremy Clarkson initiated the BBC investigation which prompted his suspension, after he informed BBC bosses of the alleged "fracas".

By Mark SavageBBC music reporter They said they were still weighing up the best way to stage the show, and were being "determined but realistic". Contestants have already been asked to produce a "live-on-tape" performance ahead of the competition. The videos will be used if artists cannot travel due to the pandemic, or are forced to quarantine at the venue. The 2021 Song Contest will still take place in Rotterdam after the Netherlands won the competition in 2019 with Arcade. Last year's event was cancelled because of the pandemic. "The Eurovision Song Contest will definitely make its welcome return this May despite the pandemic but, in the prevailing circumstances, it is regrettably impossible to hold the event in the way we are used to," executive supervisor Martin Österdahl said. Who is competing? All 41 countries who were scheduled to compete in 2020 will return, as will many of the contestants who were supposed to take part last year. However, all artists will be required to perform a different song. Returning entrants include Ireland's Lesley Roy and Iceland's Daði Freyr, who was tipped as a potential winner. The BBC has yet to reveal who will represent the UK, but last year's contestant, James Newman, has previously said he is keen to return. "I've said that I want to do it," he told BBC Radio 1 last year. "For me, it's like I want to finish what I started." What happens next? Last year, Eurovision announced four "scenarios" for how the contest could take place, ranging from a full-scale arena show with an audience, to a virtual event. On Wednesday, Eurovision announced that "scenario A", which would have involved "a packed venue", had been ruled out. Scenario B means there could still be a socially-distanced show, with a reduced audience and participants performing in Rotterdam's Ahoy arena. Strict health and safety measures, including frequent Covid testing, would be in place. For scenario C, all performances will be played "live-on-tape" with presenters helming the show from Rotterdam. Interval acts would also play live from the arena to a reduced audience. The final option would be for a fully-virtual contest, with no audience. Organisers say they are currently "focusing their efforts" on option B "while realistically keeping downscaling options on the table for the weeks to come". Follow us on Facebook, or on Twitter @BBCNewsEnts. If you have a story suggestion email entertainment.news@bbc.co.uk. Around the BBC BBC - Eurovision
Eurovision Song Contest organisers have ruled out a full live show without social distancing when this year's event is staged in May.

In his new year's message, he said announcements on rail electrification and a new nuclear reactor showed that Wales was "open for business". He said one of his priorities will be to strengthen links between the UK government and the Welsh government. The Clwyd West MP took over from Cheryl Gillan as Welsh secretary in September. Mr Jones said continuing to strengthen relations between Westminster and Cardiff Bay would benefit the people of Wales. He said: "Wales needs its two governments to work together." Mr Jones said that although 2012 was "a golden year for Great Britain" it also "underlined that we are not immune to the uncertainties faced in the global market". He said the commitment to electrify the rail network from Cardiff to Swansea and the south Wales valleys meant Wales was benefiting directly or indirectly from almost £2bn modernisation, the "most significant infrastructure announcement for Wales for decades". The agreement in principle for the Welsh government to have access to capital borrowing powers was a "major development," he added. The extra £227m in capital funding the Chancellor, George Osborne, announced in his autumn statement means the Welsh government has an extra £674m during the current spending review period, he said. A future for nuclear generation on Anglesey was highlighted by the Welsh secretary as his "number one ambition". "I was therefore delighted to welcome Hitachi's commitment to invest in new nuclear in Wylfa B," he said. "The site will play a major role in securing the nation's energy supplies and will be a key driver of economic growth, bringing between 5,000 and 6,000 construction jobs to north Wales, as well as up to 1,000 well paid, high quality employment opportunities once the site is operational." 'Important milestones' A business case for the electrification of the rail line from Holyhead to Crewe was also under discussion, Mr Jones said. "We will not achieve results overnight - the next rail investment period is still some years away - but we must start now to ensure the business case meets the same rigorous standards of the south Wales case, and to ensure that north Wales is able to put forward the economic advantages that such an investment would undoubtedly bring." Looking at the economy as a whole, he added: "There are significant grounds to believe that Wales' prospects will improve significantly over the next 12 months. However, there are still some important milestones to reach." Mr Jones also noted that the Silk commission on devolution had begun the second part of its remit, to review the current powers of the Welsh assembly, with a report due in spring 2014. He added: "I join with my ministerial colleagues at the Wales Office in wishing everyone a happy and prosperous new year."

Welsh Secretary David Jones says there are "significant grounds" to believe that Wales' economic prospects will improve "significantly" during 2013.

