During 1995 he played the 'liebeslieder' in Stephen Sondheim's A Little Night Music at the National Theatre along with Judi Dench, Patricia Hodge, Joanna Riding and Siân Phillips, and in The Ladies Paradise at the RNT Studio.

He left the role on 26 February 2005, after three and a half years and nearly 1,400 performances, making him the longest running London Phantom.

Owen-Jones reprised the role of Jean Valjean in Les Misérables at the Queen's Theatre in London, beginning 27 June 2005.

From March 2012, Owen-Jones played the title role in the show's 25th Anniversary UK tour opposite Katie Hall.

On 16 December 2010, Owen-Jones appeared in the Royal Variety Performance at the London Palladium as part of the 'Valjean Quartet' alongside Alfie Boe, Colm Wilkinson and Simon Bowman (Each of whom have previously played the role of Jean Valjean in various productions of Les Misérables).

Performing alongside Nicole Scherzinger, Owen-Jones was joined by three other former Phantoms (Simon Bowman, Earl Carpenter and Ramin Karimloo).

[2] He also performed it, along with The Music of the Night, with Karimloo, Colm Wilkinson, Peter Jöback and Anthony Warlow, at the 25th anniversary production The Phantom of the Opera at the Royal Albert Hall in October 2011.

He also sang at the 25th anniversary gala of New York's production of the show with Ramin Karimloo, Hugh Panaro, and Peter Joback, the last of whom went on to reprise the role on Broadway for a short time.

Owen-Jones also toured the UK with the Earl Carpenter production of The Three Phantoms, the highlight of which is a trio performance of 'Music of the Night'.

In 2014 he appeared at the Golden Mask Awards in Russia, where he and Anna O'Byrne sang a part of the title song of Phantom of the Opera.

He released a self-titled album in 2006 with tracks from Les Misérables, Phantom of the Opera, and a trio with Michael Ball and Bryn Terfel.