The station was originally owned by Mid-Anglia Radio and began life as CNFM (Cambridge and Newmarket FM) in February 1989, before being renamed to Q103 FM in June 1994 when it was acquired by the GWR Group.

On 1 August 2007, Q103 reverted to their 2004 strapline of "Today's Best Mix", also dropping the "Cambridge" from their name to reflect the newly extended TSA area (covering Haverhill and the longly served Newmarket on the Cambridgeshire-Suffolk border).

[1] The new station, Heart Cambridgeshire began broadcasting from Peterborough on Friday 2 July 2010.

[3] On 3 June 2019[4] a new national breakfast show launched, broadcast live from Leicester Square and hosted by Jamie Theakston and Amanda Holden.

Hannah Clarkson became the host of a new Heart East drive show, broadcast from Milton Keynes with the Cambridge studios closing.