GUEST,Olwen Blyton, I have a beautiful version of Ash Grove played on Celtic harp by Hugh Webb.

The CD is called Celtic Folk Harp. It also has another Welsh favourite of mine, David of the White Rock and some other beautiful tunes. I was given the CD which is one of those cheap generic albums and the performer was not named but I tracked the details down through a lot of determined internet searches.

There are also a number of harp players who have posted videos if you do a search for:

Ash Grove harp