:Y Byd ar Bedwar

{{Use dmy dates|date=March 2025}}

{{Use British English|date=February 2014}}

{{primary sources|date=January 2020}}

{{Infobox television

| image = Y_Byd_ar_Bedwar.jpg

| image_upright =

| image_size =

| image_alt = Title card for the S4C current affairs programme, {{lang|cy|Y Byd ar Bedwar}}

| caption = {{lang|cy|Y Byd ar Bedwar}} title card

| alt_name =

| genre = Current affairs

| opentheme =

| endtheme =

| composer =

| country = United Kingdom

| language = Welsh
(with English subtitles)

| num_series =

| num_episodes =

| executive_producer =

| producer = {{Unbulleted list|Bethan Muxworthy|}}

| editor = Branwen Thomas

| location =

| camera = Single-camera

| runtime = 24 minutes

| company = ITV Cymru Wales

| network = S4C

| first_aired = {{Start date|1982|11|df=y}}

| last_aired = present

}}

{{lang|cy|Y Byd ar Bedwar}} (Welsh for The World on Four) is a Welsh-language current affairs television programme, which has broadcast on S4C since the channel was launched in November 1982.{{Cite web |title=Y Byd ar Bedwar {{!}} S4C |url=https://www.s4c.cymru/en/factual/y-byd-ar-bedwar/ |access-date=2022-05-23 |website=s4c.cymru}} It is produced by ITV Cymru Wales.

The programme's reporters have brought stories from the four corners of the world to Welsh screens. In the 1980s, long-serving reporter Tweli Griffiths secured the first interview with Libyan dictator Colonel Gaddafi.{{cite web|url=http://www.s4c.co.uk/bydarbedwar/?p=1017&lang=en|title=S4C – hwb|work=s4c.co.uk|access-date=25 September 2015}} Reports also covered the fall of the Berlin Wall, the Chernobyl disaster and the Persian Gulf war. The programme is also famed for securing high-profile exclusive interviews in Wales, such as with Sion Aubrey Roberts,{{cite web|url=http://www.s4c.co.uk/bydarbedwar/?p=1080&lang=en|title=S4C – hwb|work=s4c.co.uk|access-date=25 September 2015}} the only person to be jailed over the Meibion Glyndwr arson campaign and Ryan James,{{cite web|url=http://www.s4c.co.uk/bydarbedwar/?p=1098&lang=en|title=S4C – hwb|work=s4c.co.uk|access-date=25 September 2015}} a vet from Ammanford who had been wrongly jailed after being accused of murdering his wife.

More recently, a series of undercover investigations into west Wales puppy farms have led to several pressure groups to call for a change in legislation by the Welsh Government to protect animals.{{cite web|url=http://www.puppylovecampaigns.org/investigations.shtml|title=Investigations|work=puppylovecampaigns.org|access-date=25 September 2015}}{{cite web|url=http://www.crueltyexposed.co.uk/index.php/the-news/33-puppy-farming|title=Crueltyexposed – Meynell and Staffordshire hunt in National Trust ban|author=hexer|work=crueltyexposed.co.uk|access-date=25 September 2015}} Senior producer Eifion Glyn travelled undercover to Zimbabwe in 2008{{cite web|url=http://www.s4c.co.uk/e_press_level2.shtml?id=213|title=S4C Press release|work=s4c.co.uk|access-date=25 September 2015}} to show the horrors of life there under Robert Mugabe's rule and also journeyed to Afghanistan for the second time in 2013 to produce a series of programmes documenting the lives of Welsh troops fighting the Taliban.{{cite web|url=http://www.s4c.co.uk/bydarbedwar/?p=1405&lang=en|title=S4C – hwb|work=s4c.co.uk|access-date=25 September 2015}}{{cite web|url=http://www.s4c.co.uk/bydarbedwar/?p=1381&lang=en|title=S4C – hwb|work=s4c.co.uk|access-date=25 September 2015}}

At home, a raw portrayal of the lives of two heroin addicts in Cardiff won the Best Current Affairs Award at the 2009 Celtic Media Festival.{{cite web|url=http://www.s4c.co.uk/bydarbedwar/?p=965&lang=en|title=S4C – hwb|work=s4c.co.uk|access-date=25 September 2015}} In 2013, another expose of the heroin scene, this time on the island of Anglesey, won the BAFTA Cymru award for current affairs.{{cite web|url=http://www.bafta.org/wales/awards/nominees-winners-2013,3886,BA.html#jump24|title=British Academy Cymru Awards Winners in 2013|work=bafta.org|access-date=25 September 2015|date=2013-09-28}} The team also secured a moving exclusive interview with the grandparents of April Jones{{cite web|url=http://www.s4c.co.uk/bydarbedwar/?p=1654&lang=en|title=S4C – hwb|work=s4c.co.uk|access-date=25 September 2015}} after the young girl's disappearance in 2012. Success at the BAFTA Cymru awards followed in 2014 with a moving response to Typhoon Haiyan and in 2015 with an emotional portrayal of the lack of provision for young people battling mental health issues in Wales.