Performers take part in BBC Music Day

Saxophonist Roz Sluman kicked off the event at Hadrian's Wall

Hundreds of musicians are taking part in BBC Music Day - a UK-wide celebration of sound.

A musical relay along the length of Hadrian's Wall began at sunrise, a gala concert is being held at Glasgow's City Halls and Manic Street Preachers are playing in Cardiff.

Jamie Cullum, Deacon Blue and Lulu are performing in Glasgow, while Belfast's Crumlin Road Gaol is hosting a concert.

A world record for the longest distance between singers of a duet was also set.

Anna Flanagan contributed her vocals to the event

Accompanied by the BBC National Orchestra of Wales, classical singer Shan Cothi in Cardiff sang the Welsh hymn Calon Lan with Andres Evans, a member of the Welsh community in Patagonia - 12,120 kilometres away.

Singer Raer Morris performed live for Ken Bruce's Radio 2 show

Events and performances are being broadcast across the BBC, with BBC One's The One Show broadcasting live from the Music Day event in Glasgow.

BBC Music director Bob Shennan said the day was "a unique opportunity for people to celebrate music and musical talent, whether attending one of the many events taking place or tuning in at home".

Highlights in each location include:

• BRADFORD - An open-air concert in Bradford City Park featuring wind bands, choirs and local acts;

• BRISTOL - An afternoon concert featuring Charles Hazlewood conducting members of the British Paraorchestra;

• LIVERPOOL - A free concert on the waterfront featuring a Mozart "mash-up" and Craig Charles's Fantasy Funk Band;

• LONDON - Various local music groups performing in different locations across the borough of Walthamstow;

• NORTHERN IRELAND - An evening concert in Belfast's Crumlin Road Gaol featuring Sir James Galway on flute;

• PLYMOUTH - Live performances in the city's piazza from young local talent and BBC Introducing bands;

• PORTSMOUTH - A performance of Anna Meredith's Ten Pieces composition Connect It by more than 500 local schoolchildren;

• SCOTLAND - A live-streamed edition of Ken Bruce's Radio 2 show featuring appearances from Midge Ure and James Bay;

• WALES - Manic Street Preachers performing before 10,000 people at a sold-out concert at Cardiff Castle.

The Hadrian's Wall of Sound began with saxophonist Roz Sluman greeting the day at 06:00 BST at Bowness-on-Solway. A BBC live page has been covering the event throughout the day.

The BBC Music initiative officially launched in October 2014 with an all-star reworking of the Beach Boys' God Only Knows.