Digging even deeper into the stack of old, dusty dirty wood I found what looked like a piece of burr. Turning it carefully ( fair few splits and gaps in it) I kept the smallest fissures and filled them with copper. . Final result is an elm burr with an oak pedestal stained to a reasonable match. 13" (330mm) diameter and standing 6" (150mm) tall the unusual shape has been dictated by the wood as bits came loose and some that had to be removes. A bit reminiscent of the georgian urns. Serendipity not deliberate.
C&C welcome as always.
Pete