# Digital One

Digital One is a national commercial digital radio multiplex in the United Kingdom, owned by Arqiva. As of March 2010, the multiplex covered more than 90% of the population from 137 transmitters. Coverage was extended to Northern Ireland in July 2013. It contains a list of DAB and DAB+ radio stations operated by Bauer Media Audio UK, Global Media & Entertainment and News Broadcasting.

## Stations carried

DAB
| Service | Service ID | Bit rate | Audio channels | Description | DAB launch date | Analogue availability |
| Absolute Radio | C1C0 | 80 kbit/s | Mono | Adult alternative music, carries London output during any programme splits, but with national news and advertising | 15 November 1999 | 1197 kHz, 1215 kHz, 1242 kHz, 1260 kHz (closed in January 2023) |
| Kiss UK | C5C0 | 80 kbit/s | Mono LSF | A London-based station specialising in hip hop, R&B, urban and electronic dance music owned by Bauer Radio. Also broadcast on FM in London, South Wales and the Severn Estuary, and East Anglia; all frequencies including D1 now share programme content | 27 December 2012 | 97.2, 100, 101 and 106.1 MHz (closed in September 2024) |
| Kisstory | CFE6 | 80 kbit/s | Mono LSF | Old Skool & Anthems. Owned by Bauer Radio as a sibling to Kiss FM UK. Was broadcast on Sound Digital prior to D1 addition. | 11 February 2019 | |
| LBC | C0C2 | 64 kbit/s | Mono | A national talk and phone-in station owned by Global Radio and also broadcast on 97.3 MHz in London. | 11 February 2014 | 97.3 MHz (London) |
| Magic | C0C6 | 80 kbit/s | Mono | Melodic soft adult contemporary hits. Replaces Absolute Radio 90s. | 1 January 2015 | 105.4 MHz (London) |
| Talksport | C0C0 | 64 kbit/s | Mono LSF | Sport and talk | 15 November 1999 | 1053, 1071, 1089 kHz |
DAB+
| Service | Service ID | Bit rate | Audio channels | Description | DAB launch date | Analogue availability |
| Capital Dance | C9ED | 40 kbit/s | Stereo DAB+ | Dance | 1 October 2020 |
| Capital UK | C5DA | 40 kbit/s | Stereo DAB+ | Contemporary Hit Radio | 12 September 2016 | 95.8–107.6 MHz |
| Capital XTRA | C37B | 40 kbit/s | Stereo DAB+ | Urban and Dance Music. Formerly branded as Choice FM; relaunched and renamed to coincide with its national DAB availability | 7 October 2013 | 96.9 and 107.1 MHz (London) |
| Classic FM | C2A1 | 64 kbit/s | Stereo DAB+ | Classical music | 15 November 1999 | 99.9–101.9 MHz |
| GB News Radio | C4F0 | 24 kbit/s | Mono DAB+ | Talk Radio (Right-Wing News) | 4 January 2022 |
| Gold UK | CEE8 | 40 kbit/s | Stereo DAB+ | Classic hits. Previously transmitted on local AM and DAB prior to D1 addition, having evolved from Capital Gold (1988). | 10 June 2019 | |
| Heart Dance | CFE8 | 40 kbit/s | Stereo DAB+ | Rhythmic adult contemporary | 21 June 2019 | |
| Heart UK | CFD1 | 40 kbit/s | Stereo DAB+ | Adult contemporary music | 29 February 2016 | 96–107 MHz |
| Heart 70s | CAE9 | 32 kbit/s | Stereo DAB+ | 1970s music | 30 August 2019 | |
| Heart 80s | C1DC | 40 kbit/s | Stereo DAB+ | 1980s music | 14 March 2017 | |
| Heart 90s | CBE9 | 40 kbit/s | Stereo DAB+ | 1990s music | 29 August 2019 | |
| Heart 00s | C9F3 | 40 kbit/s | Stereo DAB+ | 2000s music | 20 May 2022 | |
| LBC News | C8EA | 32 kbit/s | Mono DAB+ | 24-hour rolling news station with updates every 20 minutes. | 28 October 2019 | 1152 kHz (London) |
| Radio X | C4CD | 40 kbit/s | Stereo DAB+ | Rock station primarily playing alternative and indie music. Previously broadcast in mono on DAB from launch until moving to DAB+ on 25 October 2019. | 21 September 2015 | 104.9 MHz (London) 97.7 MHz (Manchester) |
| Smooth Chill | C1C3 | 32 kbit/s | Stereo DAB+ | Chill out, ambient and trip-hop music. | 8 April 2020 | — |
| Smooth Relax | C4FB | 32 kbit/s | Stereo DAB+ | Relaxing melodic hits. | 8 January 2024 | |
| Smooth UK | C6C0 | 40 kbit/s | Stereo DAB+ | Melodic hits from the past five decades. | 12 March 2020 | 96.4–108.0 MHz |
| UCB 1 | C4CA | 24 kbit/s | Stereo DAB+ | Christian music | 1 December 2009 | — |
| UCB 2 | CBD8 | 32 kbit/s | Stereo DAB+ | Christian music | |

## History

On 24 March 1998, the Radio Authority advertised for the first national ensemble to be broadcast on DAB, with the three Independent National Radio services on FM and medium wave required to be included in the ensemble. This included Classic FM, Talk Radio UK (now Talksport) and Virgin Radio (now Absolute Radio). The licence was awarded to the sole applicant, GWR Group and NTL Broadcast to form Digital One. The original licence application included the following stations:
Digital One Ltd (original application) :
| Classic FM | Classical music | GWR (now part of Global Radio) |
| Classic Gold Rock | Rock music | NTL |
| Club dance | Dance music | TBA |
| Plays, books and music | Comedy, drama and serials | TBA |
| Rolling news service | Rolling news | ITN |
| Soft AC | Female contemporary music | TBA |
| Sports channel | Live sports and comment | Talk Radio UK |
| Talk Radio (now Talksport) | Talk radio | Talk Radio UK (now owned by Wireless Group) |
| Teen and chart hits | Pop and dance music | GWR |
| Virgin Radio (now Absolute Radio) | Complementary rock music | SMG plc (station is now owned by Bauer Media) |
Digital One was due to launch on 1 October 1999, but this was postponed until 15 November 1999.
The "Classic Gold Rock" service eventually went on air as Planet Rock, which remains on air, having migrated from D1 to the Sound Digital multiplex in 2016; it is, however, the only one of the D1 launch stations (bar the INR simulcasts) still to be broadcasting as of 2017, and is also the longest-established DAB-first service in UK national radio, having been a digital-only service until 2013, when new owner Bauer put PR on their 105.2 FM frequency in the West Midlands (previously Kerrang! Radio); the FM berth was turned over to Absolute Radio in September 2015, leaving Planet Rock as a digital-only service once again. The "plays, books and music" service went on air as Oneword. The "Teen & Chart Hits" service became Core, and the "Soft AC" service – which was ultimately provided by the then Capital Radio Group (now part of Global Radio) was launched as Life (later known as Capital Life). The "Sports Channel" proposal was dropped as a separate entity and instead combined with Talk Radio in 2000 to form the current Talksport as broadcast on AM and DAB. ITN's rolling news service ultimately went on air as part of the multiplex, later joined by a business news service provided by Bloomberg. "Club Dance", however, never made it to air. The space released by the absence of the Club Dance and Sports Channel services from the eventual lineup was used to allow the Oneword service to end at midnight rather than the proposed 7pm, and also freed up a slot for a melodic easy-listening music service aimed at an older audience, the Saga-operated PrimeTime Radio.
After the closure of PrimeTime Radio in 2006, the original licence was amended to allow the launch of a new classic and contemporary jazz service, TheJazz which was launched on 25 December 2006, before 31 December 2006 deadline set in the licence amendment.
On 11 February 2008 GCap announced that it was selling its interest in Digital One to Arqiva and that "non-core" DAB stations Planet Rock and TheJazz would be closing by the end of March 2008. Whilst TheJazz ceased broadcasting at midnight on 30 April 2008, Planet Rock was sold off and remains on air. GCap also closed down their two other D1-only stations, Core and Capital Life, prior to GCap being taken over later in 2008 by Global Radio.

## Former services

Services previously carried on the multiplex include:
* Smooth Radio Christmas – festive music service, ran from 1 November until 27 December 2011 and operated again as a pop-up in Nov/Dec 2012, 2014 and 2015 (due to the launch of Capital Xtra there was not space for the service in 2013)
* Absolute Radio 80s – 1980s music service. Transferred to the Sound Digital multiplex on 29 February 2016.
* Absolute Radio 90s – 1990s music service. Moved onto Digital One from 2010 – initially sharing a slot with Absolute Radio Extra – having previously been provided on local DAB; returned to local-layer DAB in January 2015 so that its capacity could go towards the addition of Magic to Digital One. Absolute Radio 90s returned to Digital One during 2018 (replacing Magic Christmas), before migrating across to Sound Digital in February 2019, as part of a wider reorganisation of Bauer's space across national and local DAB, ahead of the launch of Scala Radio on SDL in March.
* Planet Rock – Classic rock music station. Transferred to the Sound Digital multiplex on 29 February 2016.
* Smooth Radio – Easy listening service relaunched in 2010 as national network; local content on local/regional FM frequencies was replaced with network output also broadcast nationally on Digital One. New owners reintroduced local content on local FM/DAB in March 2014 and withdrew Smooth from Digital One in November 2014.
* NME Radio (ceased on 12 July 2010)
* Panjab Radio (temporary service, ceased on 31 May 2010)
* Fun Kids (temporary service, ceased on 3 October 2009)
* Birdsong (ceased on 1 June 2009, replaced by Amazing Radio)
* TheJazz (ceased on 31 March 2008)
* Capital Life (ceased on 31 March 2008)
* Core (ceased on 11 January 2008, immediately replaced by BFBS Radio)
* Oneword (ceased on 11 January 2008 because of financial problems, replaced by Birdsong – see the section below)
* Primetime (ceased on 24 May 2006, replaced by theJazz on 25 December 2006)
* D1 Temp (ceased on 9 June 2005 – see the section below)
* Bloomberg (ceased on 6 December 2003, replaced by D1 Temp)
* ITN (ceased on 1 July 2003)
* Smooth Radio 70s (ceased on 6 October 2013)
* TeamRock SID C0C1 (started on 1 May 2013, ceased on 1 July 2015)
* Premier Christian Radio (started on 21 September 2009, transferred to the Sound Digital multiplex on 29 February 2016)
* BFBS Radio – following an initial three-month trial service (replacing Core), which ended on 31 March 2008, test transmissions for a permanent service began on 17 April 2009 and the station officially launched as a full-time service on Digital One at 07:00 on 20 April 2009. The station was withdrawn from Digital One on 6 March 2017; broadcasts of BFBS services on other platforms continue.
* Heart Extra and Smooth Extra – these stations played automated music during the daytime, simulcasting the breakfast and evening/night programmes of Heart London and Smooth London respectively. Smooth Extra launched 27 December 2014, following the removal of Smooth Radio (2010) from Digital One (Smooth Christmas had used the slot in November/December), with Heart Extra following in February 2016 in tandem with the migration of several stations from Digital One to Sound Digital. Heart Extra and Smooth Extra converted from mono DAB to stereo DAB+ in 2019, and closed on 12 March 2020, replaced by the national Heart UK and Smooth UK feeds (already used on other national platforms such as TV) The Extra stations' broadcast slots on satellite TV had earlier been switched over to Heart 80s and Heart Dance respectively.
In addition to the audio services listed above a number of data services, short lived temporary audio services, and mobile video channels have been broadcast on this multiplex.

## Birdsong

Birdsong was a temporary transmission of a continuously looping recording of bird song.
When the magazine-format digital radio station Oneword ceased in January 2008, the birdsong audio returned to the multiplex on the Oneword channel and the service name of the DAB channel changed to "Birdsong", until Amazing Radio launched on 1 June 2009.