A second Supreme Court judgement in as many months has shed further light on the multi-billion dollar AVWest Aircraft business run by Perth rich lister Tim Roberts, who is in dispute with law firm Clayton Utz and Canadian manufacturer Bombardier.

A second Supreme Court judgement in as many months has shed further light on the multi-billion dollar AVWest Aircraft business run by Perth rich lister Tim Roberts, who is in dispute with law firm Clayton Utz and Canadian manufacturer Bombardier.