keywords: multiplex westfield chelsfield sydney aldersgate
text: Australia #39;s Westfield, Multiplex join in new offer for Britain #39;s &lt;b&gt;...&lt;/b&gt; SYDNEY: Australian shopping center giant Westfield is teaming up with property group Multiplex and Aldersgate Investments to make a cash offer for Duelguide, the company which owns British developer Chelsfield.