CIQM originally operated as Q103 at 103.1 FM (now the home of CFHK-FM in St. Thomas) from its sign-on in 1986[1] until moving to the 97.5 frequency vacated by CKO in 1993.On September 6, 2010, CIQM underwent several changes, including a tweak in branding (as The New Sound of EZ Rock), a new logo and new on-air staff.The switch was due to rival CKOT-FM switching from easy listening to a gold-based soft AC mix, and also because of rimshot rivals CIHR-FM and CHGK-FM, both mainstream AC stations, also being heard in London.Despite all of the changes, CIQM, which once dominated the market, suffered from ratings erosion, and had the lowest share in the London CMA, and was a distant second place behind CKOT.CIQM-FM's flip to CHR filled the Top 40 void in London for the first time since 2004, when CFHK dropped it in favour of its current Hot AC format.