Sarah do you know any more about him? Such as what medium he worked in eg watercolours or oil, any associates or school, where he worked or exhibited.

If he died as recently as April 2005 surely the obituary columns of the national press would have mentioned him, or the specialist art magazines.

If you are a member of your local library in the UK you should be able to access Grove thanks to a new agreement between OUP and MLA Oxford Online