He ran as a regional candidate in the 2021 Scottish Parliament election as a member of the Alba Party, but quickly sparked controversy due to his online comments mocking travellers, an AIDS survivor, and spreading COVID-19 misinformation.

Also on the card that day were fighters of the quality of Anthony Farnell, Junior Witter, Matthew Hatton, Michael Jennings and Jamie Moore.

The win established Arthur as a force on the domestic scene and he followed up the victory with two defences against Carl Greaves and fellow Scot Willie Limond.

Michael Gomez fought Arthur for the British and WBA International super featherweight titles in front of a sold out Meadowbank Stadium, Edinburgh, Scotland in October 2003.

Boxing promoter Frank Warren called the fight "the greatest contest seen on these shores since Nigel Benn beat Gerald McClellan in 1995".

[10] He made his comeback the next year on 27 March 2004 by stopping Michael Kizza in the first round for the IBF Inter-Continental super featherweight title.

He managed to defeat the experienced Russian with a wide 12 round decision and so held the British, Commonwealth and European title belts at the same time.

[15][16] Arthur however surrendered the title in his very next fight, losing a unanimous points decision to England's Nicky Cook at the MEN Arena in Manchester on 9 September 2008.

His first event took place at the Meadowbank Stadium in Edinburgh on 27 August 2011 where Arthur fought Aleksander Vakhtangashvili and won via TKO in the fourth round.

On 14 April 2012 AAA Promotions staged their second and final event again at the Meadowbank Stadium where Arthur faced Michael Frontin and won via points after 8 rounds.

[21] Shortly after the announcement, controversy emerged over his previous comments on social media, where he compared Romanian beggars to "juicy overfed pigs", openly mocked an AIDS survivor, and spread misinformation on COVID-19 vaccination.

[29] New measures for children with gender dysphoria prompted a backlash, with Arthur stating "Kids at that age don't know if they're going for a shite or a haircut".