McFly Announce One Night Only (Again) Show At London's O2 Arena Tuesday, 15 December 2020 McFly have confirmed a huge London show for 2021. The quartet will return to the O2 Arena on November 21 for a performance billed as One Night Only (Again), with tickets on general sale at 9am on December 18. It follows their One Night Only gig at the venue back in 2019. McFly put out their latest LP, 'Young Dumb Thrills', in November of this year. They'll support the record with a rescheduled UK arena tour in the spring. Original tickets remain valid for the corresponding new dates. Next year, the band will also play a number of outdoor shows across the country, including Newmarket Racecourse, Trentham Estate and Bath Recreation Ground. Remaining tickets are available now.