It is called 'Gold' and was written by Charlie Morgan.
Googling suggests one of two Charlie Morgans. One is alive and is a drummer in some pop-music groups in the UK and the other in no longer with us, although he was 'a clasically trained pianist . I believe the latter is responsible for the work but cannot validate that statement.
By the sounds of it - I think it may be a duet and it is very indeed very pretty.
If I am right in that it is the 'moved on' Mr Morgan...a little information can be gleaned from Anne Clarke's website at ....you guessed it... www.anneclark.com
and like you....I'd be willing to part with some ��� to get the sheet music.