The station launched on 4 March 1990 as Jazz FM, playing mainly soul and jazz music. It was relaunched in June 2005 as 102.2 Smooth FM, playing middle of the road music, soul and R&B during the day and, as part of its licence requirements, focused on jazz music at night. On 20 October 2006, GMG Radio announced that it was requesting a change of format for 102.2 Smooth FM from Ofcom, moving the station away from its daytime soul and R&B remit which had, until that point, formed an integral part of the licence. GMG proposed an easy listening music service mixed with speech for the over 50s, coupled with an improved local news service. Ofcom approved the changes on 8 December 2006, with the condition that GMG retained the 45 hours of jazz per week that constituted part of the former licence requirement. As a result of the format change, GMG agreed to adhere to a minimum of 20% of its music during daytime being over 40 years old, to distance the station from its London rivals Magic and Heart 106.2. In March 2008, GMG requested a format change to remove the 45-hour jazz commitment it has in place for 102.2 Smooth Radio. Part of the plans included a relaunch of Jazz FM from the jazzfm.com service onto a DAB multiplex in London. In a meeting on 22 April 2008 Ofcom denied GMG's request to drop its jazz commitments. GMG, under licence to The Local Radio Company relaunched Jazz FM despite the decision. On 6 October 2008 Smooth Radio was removed from the MXR Wales and West multiplex to allow for the relaunch of Jazz FM. Although initially, Real Radio was removed, Smooth Radio was removed and Real restored on the multiplex. It replaced Jazz FM in South Wales and returned to DAB. Local programming originated from studios in London. Networked programming was syndicated from sister station Smooth North West at Salford Quays, Manchester. In 2010 GMG announced that it would be merging its five Smooth stations in England to create a nationwide Smooth Radio service based in Manchester. The new station was launched on 4 October 2010 and could be heard both on DAB and on the locally on the FM frequencies.
Global Radio ownership
Smooth Radio's output was relocated to new owner Global's Leicester Square headquarters from 1 October 2013, a move that coincided with a major overhaul of its schedule, and the closure of Smooth 70s after 21 months on air. On 4 February 2014, the Radio Today website reported that Ofcom had given Global permission to remove Smooth from the Digital One platform, and to replace it with a service playing music from the 1970s, 80s and 90s. Under this agreement, Smooth would continue to broadcast on its regional frequencies, but would be required to provide seven hours of local output per day.
Programming
The station broadcasts from Global's London headquarters 24 hours a day – all AM stations carry the same programming as the London station, with the exception of weekday afternoon opt-outs for the two stations in Wales. Smooth London also broadcasts hourly news bulletins 24 hours a day from Global's London newsroom, including networked overnight and weekend updates on the hour.