BBC Radio 1 part of a Guinness World Record attempt, in aid of Comic Relief. The pair stayed on air for 52 hours in total setting a new world record for 'Radio DJ Endurance Marathon (Team)’ after already breaking Simon Mayo's 12-year record for Radio 1's Longest Show of 37 hours which he set in 1999, also for Comic Relief. The presenters started on 16 March 2011 and came off air at 10:30am on 18 March 2011. During this Fearne Cotton made a bet with DJ Chris Moyles that if they raise over £2,000,000 she will appear on the show in a swimsuit.
BBC Radio 1 1 stopped broadcasting on Radio 2's FM frequencies on weeknights and on Sunday evenings and by 1990 all usage of Radio 2's FM frequencies had ended. Radio 1 made great efforts to promote its new FM service, renaming itself on-air initially to 'Radio 1 FM' and later as '1FM' until 1995. The engineering programme was initially completed in 1995. The Conservative government decided to increase competition on AM and disallowed the simulcasting of services on both AM and FM, affecting both BBC and Independent Local Radio. Radio 1's medium wave frequencies were reallocated to Independent National Radio. Radio 1's last