Flex broadcasts house, drum and bass, dubstep, UK garage, old skool hardcore, reggae and soul to London and surrounding areas on 101.4FM.

Flex was first established in 1992 as a breakaway station from Don FM and began broadcasting from Merton, South West London, on the frequency of 103.6FM.

During that time, it followed the path of a number of other pirates in the capital of playing breakbeat hardcore, through jungle and drum and bass, onto UK garage, until it left the airwaves in 2003.

[1] During this first period on-air, DJs, MCs and artists to have played on the station have included DJ Deekline (who scored a number 11 UK chart hit with "I Don't Smoke" in the summer of 2000),[2] MC Hyperactive, the Genius Cru (who had a top 20 UK chart hit with "Boom Selection" in early 2001), Billy Whizz, Lady Sovereign, Ed Rush, DJ Gunshot, Optical, Funky T, Donna Dee, LS, DJ Wise, and Paul Strobe.

[6] In October 2016, Flex applied for one of the forthcoming community licenses being advertised in London,[7] which would prove to be successful in its bid in May 2017.