the founding members were tony duhig ( guitar ) ( born anthony christopher duhig , 18 september 1941 , acton , west london ; died 11 november 1990 , somerset , england ) , jon field ( flute , percussion , keyboards ) ( born john frederick field , 5 july 1940 , harrow , middlesex ) and glyn havard ( vocals , bass ) ( born 15 february 1947 , nantyglo , south wales ) .