Follow the time codes below for a breakdown of where the different elements for Damon Albarn's piece marking the 90th anniversary of �� Radio come from.

00:00 Radio 4 broadcasts the chimes of Big Ben – the ‘bongs’ – live every day at 6pm and at midnight.

00:18 In 1922 the radio transmitter 2LO broadcast for one hour a day from Marconi House in the Strand. This audio, recorded in the 1930s, recreates the ��’s first ever transmission.

00:26 The pop hit of the day, Three O’Clock in the Morning, a waltz by American bandleader Paul Whiteman, one of the first pieces of music played on the ��.

00:35 The songs of the blackbird and lark are from the British Library’s sound archive – a collection that includes wax cylinders and MP3s.

“Hello future”. The first message in the piece was sent by a �� Radio 6 Music listener. One of the ��’s first digital stations it first broadcast on 11 March 2002. The clip is voiced up by Nico, the resident Kid Critic on Steve Lamacq’s 6 Music show.

00:44 The shortwave radio sample is from Freesound – a database of audio that anyone can add to or download from.

Bertrand Russell delivered the first Reith Lecture in 1948. The Morse code is his quote, "Love is wise, hatred is foolish".

00:50 “If time travel does exist...” Will we ever know if time travel exists? Stephen Hawking once held a party for time travellers but no one showed up. This message was recorded by a child at Bath Community Academy.

00:51 Pashto is spoken in Afghanistan and Pakistan. In English the message, sent to the �� World Service, means “Please destroy all weapons.”

00:59 “We’ll be living on Mars…” At the closest point in its orbit Mars is 35 million miles from Earth. In October 2012 Nasa's Curiosity rover found soil on Mars to be similar to Hawaii's after sifting and scanning its first sample on the Red Planet.

01:07 “Everything is connected”. Kevin Kelly is obsessed with the meeting of technology and biology and is widely regarded as a digital visionary.

01:10 “Keep talking to one another…” Message sent to �� Radio Cornwall.

01:18 “Proud…” The message sent by a listener to �� Radio Lincolnshire is in response to London’s staging of 2012 Olympic Games.

Message sent in to the �� Persian Service from Iran

“I hope 90 years from now, no one misuses religion…” The �� Persian service has been broadcasting since the 1940s.

“ We can do better.” Message sent from Australia to �� Outlook on the World Service.

01:27 “I hope it doesn't get too hot...” The Great Barrier Reef is the largest collection of corals in the world. Climate change and pollution are among the threats to this fragile ecosystem.

“Dressed up…” The World Service broadcast the audio of 2011’s election in Cameroon. President Paul Biya retained the position he’s held since 1982.

01:32 “We are all caught up in this rat race…” Message recorded in London.

01:38 “How time flies! Recorded in Nigeria and sent to the World Service’s Hausa language service.

01:47 “Fresh air, woods…” Recorded by a Dane living in London.

01:48 “I think it’s gonna be a bright colour… “ Recorded by a listener in Gwent.

01:58 “I think there’ll be more people…” The global population is currently estimated at around 7 billion. In 2011 the UN predicted it may hit 10.1 billion by the year 2100.

02:10 The �� first broadcast the Greenwich Time Signal aka ‘the Pips’ in 1924. Each pip is a 1 kHz tone (about half way between musical B5 and C6). This is a rare opportunity to hear them not on the hour since as a rule the �� only allows them to be used for time-keeping purposes.

02:15 Radio Reunited concludes with a piece inspired by the ‘pips’ that Damon Albarn specially composed which he plays it on piano and glockenspiel.

Unless you have kept well clear of the media this week, you will have seen or heard that we have been marking the 60th anniversary of the world's longest running continuous drama. The Archers has been a central part of listener's lives since 1951 and, if nothing else, the past few days have proved that it is precious and in rude health.

As you may be aware, debate is raging, particularly over the instantly infamous death of Nigel Pargetter in that ran on Jan 2nd.Â Even before his extended scream as he fell from the roof of Lower Loxley Hall, and were buzzing. The reaction has spanned many emotions: listeners are angry, supportive, underwhelmed, overwhelmed, shocked, sad and enthralled. Above all, what is clear is that they care, deeply, about what happens in Ambridge.

I understand that some listeners think the special episode received too much attention, but we do need to be able to showcase and highlight the wonders of radio drama. The Archers is quite different to other dramasÂ and I agree that weÂ should let audiences quietly find the plotÂ (too much 'sell' can be counter-productive), but this was a special occasion and we view it as a very rare set of circumstances. We should resist the sense that there is a growing need to sensationalise to build impact.

Also, those that do not believe that recent revelations were big enough to have "shaken Ambridge to the core" (the words of the Archers'Â editor, Vanessa Whitburn) should listen for a year or two to see just how big these events are: not in comparison with TV spectaculars but for the residents of Ambridge (and the loyal listeners).

Meanwhile, if you have not heard the programme or want to read the comments from listeners, here are some links for you to explore. Now is a good time to immerse yourself.

Tim Davie is Director of Audio & Music at the ��

Listen to the dramatic anniversary double episode and to a full day of Archers episodes from the archive .
Archers scriptwriter and web site editor Keri Davies has put together to the anniversary episode for the Archers blog.
The was recently relaunched. The site hosted the weekend's celebration of the 60th anniversary, including and a special '' during the big episode.
The are among the busiest at the �� (over one million comments per year). There is , a and (the hashtag is ). All have been hugely busy during the build-up to and the aftermath of .
was played for 27 years by Graham Seed. He was on Tuesday.
The phrase "shake Ambridge to the core" first occurred in a formal �� document called the '' where it was picked up and popularised by listeners. The hashtag has been widely used.
The picture shows the Pargetter family. Left-to-right: (played by Graham Seed), Lily, (played by Alison Dowling) and Freddie.

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Radio Reunited explained

Immerse yourself in The Archers

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Radio Reunited explained

Immerse yourself in The Archers

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