Chichester Music Press : 

Côr Bro Ogwr :http://www.Cor-Bro-Ogwr.com

Karl Jenkins Music Ltd  http://www.karljenkins.com

Wyn Pearson :http://www.wynpearson.com

                   The Athenaeum Singers:

 Royal Welsh College of Music and Drama http://www.rwcmd.ac.uk

 London Welsh Male Voice Choir: http://www.londonwelshmvc.org/

 Reading Festival Chorus: http://www.readingfestivalchorus.org.uk/

London Welsh Chorale: http://www.londonwelshchorale.org.uk/ 

Choir of The World 2012 : http://www.choiroftheworld.com/

Banks Music Publications: http://www.banksmusicpublications.co.uk/ 

Welsh Session Orchestra : http://altoproductions.co.uk/